diff options
Diffstat (limited to 'lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp')
| -rw-r--r-- | lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp | 121 |
1 files changed, 57 insertions, 64 deletions
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp index eabff86a542..0d7fd321ed0 100644 --- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp +++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDebugMap.cpp @@ -44,10 +44,8 @@ using namespace lldb; using namespace lldb_private; // Subclass lldb_private::Module so we can intercept the -// "Module::GetObjectFile()" -// (so we can fixup the object file sections) and also for -// "Module::GetSymbolVendor()" -// (so we can fixup the symbol file id. +// "Module::GetObjectFile()" (so we can fixup the object file sections) and +// also for "Module::GetSymbolVendor()" (so we can fixup the symbol file id. const SymbolFileDWARFDebugMap::FileRangeMap & SymbolFileDWARFDebugMap::CompileUnitInfo::GetFileRangeMap( @@ -84,8 +82,8 @@ SymbolFileDWARFDebugMap::CompileUnitInfo::GetFileRangeMap( /// const uint32_t fun_resolve_flags = SymbolContext::Module | /// eSymbolContextCompUnit | eSymbolContextFunction; // SectionList *oso_sections = oso_objfile->Sections(); - // Now we need to make sections that map from zero based object - // file addresses to where things ended up in the main executable. + // Now we need to make sections that map from zero based object file + // addresses to where things ended up in the main executable. assert(comp_unit_info->first_symbol_index != UINT32_MAX); // End index is one past the last valid symbol index @@ -104,9 +102,9 @@ SymbolFileDWARFDebugMap::CompileUnitInfo::GetFileRangeMap( break; case eSymbolTypeCode: { - // For each N_FUN, or function that we run into in the debug map - // we make a new section that we add to the sections found in the - // .o file. This new section has the file address set to what the + // For each N_FUN, or function that we run into in the debug map we + // make a new section that we add to the sections found in the .o + // file. This new section has the file address set to what the // addresses are in the .o file, and the load address is adjusted // to match where it ended up in the final executable! We do this // before we parse any dwarf info so that when it goes get parsed @@ -129,21 +127,21 @@ SymbolFileDWARFDebugMap::CompileUnitInfo::GetFileRangeMap( } break; case eSymbolTypeData: { - // For each N_GSYM we remap the address for the global by making - // a new section that we add to the sections found in the .o file. - // This new section has the file address set to what the - // addresses are in the .o file, and the load address is adjusted - // to match where it ended up in the final executable! We do this - // before we parse any dwarf info so that when it goes get parsed - // all section/offset addresses that get registered will resolve + // For each N_GSYM we remap the address for the global by making a + // new section that we add to the sections found in the .o file. + // This new section has the file address set to what the addresses + // are in the .o file, and the load address is adjusted to match + // where it ended up in the final executable! We do this before we + // parse any dwarf info so that when it goes get parsed all + // section/offset addresses that get registered will resolve // correctly to the new addresses in the main executable. We // initially set the section size to be 1 byte, but will need to // fix up these addresses further after all globals have been // parsed to span the gaps, or we can find the global variable // sizes from the DWARF info as we are parsing. - // Next we find the non-stab entry that corresponds to the N_GSYM in - // the .o file + // Next we find the non-stab entry that corresponds to the N_GSYM + // in the .o file Symbol *oso_gsym_symbol = oso_symtab->FindFirstSymbolWithNameAndType( exe_symbol->GetMangled().GetName(lldb::eLanguageTypeUnknown, @@ -198,9 +196,9 @@ public: SymbolVendor *symbol_vendor = Module::GetSymbolVendor(can_create, feedback_strm); if (symbol_vendor) { - // Set a pointer to this class to set our OSO DWARF file know - // that the DWARF is being used along with a debug map and that - // it will have the remapped sections that we do below. + // Set a pointer to this class to set our OSO DWARF file know that + // the DWARF is being used along with a debug map and that it will + // have the remapped sections that we do below. SymbolFileDWARF *oso_symfile = SymbolFileDWARFDebugMap::GetSymbolFileAsSymbolFileDWARF( symbol_vendor->GetSymbolFile()); @@ -292,8 +290,8 @@ void SymbolFileDWARFDebugMap::InitOSO() { // In order to get the abilities of this plug-in, we look at the list of // N_OSO entries (object files) from the symbol table and make sure that - // these files exist and also contain valid DWARF. If we get any of that - // then we return the abilities of the first N_OSO's DWARF. + // these files exist and also contain valid DWARF. If we get any of that then + // we return the abilities of the first N_OSO's DWARF. Symtab *symtab = m_obj_file->GetSymtab(); if (symtab) { @@ -303,10 +301,10 @@ void SymbolFileDWARFDebugMap::InitOSO() { // When a mach-o symbol is encoded, the n_type field is encoded in bits // 23:16, and the n_desc field is encoded in bits 15:0. // - // To find all N_OSO entries that are part of the DWARF + debug map - // we find only object file symbols with the flags value as follows: - // bits 23:16 == 0x66 (N_OSO) - // bits 15: 0 == 0x0001 (specifies this is a debug map object file) + // To find all N_OSO entries that are part of the DWARF + debug map we find + // only object file symbols with the flags value as follows: bits 23:16 == + // 0x66 (N_OSO) bits 15: 0 == 0x0001 (specifies this is a debug map object + // file) const uint32_t k_oso_symbol_flags_value = 0x660001u; const uint32_t oso_index_count = @@ -443,16 +441,15 @@ Module *SymbolFileDWARFDebugMap::GetModuleByCompUnitInfo( return NULL; } } - // Always create a new module for .o files. Why? Because we - // use the debug map, to add new sections to each .o file and - // even though a .o file might not have changed, the sections - // that get added to the .o file can change. + // Always create a new module for .o files. Why? Because we use the debug + // map, to add new sections to each .o file and even though a .o file + // might not have changed, the sections that get added to the .o file can + // change. ArchSpec oso_arch; // Only adopt the architecture from the module (not the vendor or OS) - // since .o files for "i386-apple-ios" will historically show up as - // "i386-apple-macosx" - // due to the lack of a LC_VERSION_MIN_MACOSX or LC_VERSION_MIN_IPHONEOS - // load command... + // since .o files for "i386-apple-ios" will historically show up as "i386 + // -apple-macosx" due to the lack of a LC_VERSION_MIN_MACOSX or + // LC_VERSION_MIN_IPHONEOS load command... oso_arch.SetTriple(m_obj_file->GetModule() ->GetArchitecture() .GetTriple() @@ -546,8 +543,8 @@ SymbolFileDWARF *SymbolFileDWARFDebugMap::GetSymbolFileByCompUnitInfo( uint32_t SymbolFileDWARFDebugMap::CalculateAbilities() { // In order to get the abilities of this plug-in, we look at the list of // N_OSO entries (object files) from the symbol table and make sure that - // these files exist and also contain valid DWARF. If we get any of that - // then we return the abilities of the first N_OSO's DWARF. + // these files exist and also contain valid DWARF. If we get any of that then + // we return the abilities of the first N_OSO's DWARF. const uint32_t oso_index_count = GetNumCompileUnits(); if (oso_index_count > 0) { @@ -576,9 +573,8 @@ CompUnitSP SymbolFileDWARFDebugMap::ParseCompileUnitAtIndex(uint32_t cu_idx) { if (oso_module) { FileSpec so_file_spec; if (GetFileSpecForSO(cu_idx, so_file_spec)) { - // User zero as the ID to match the compile unit at offset - // zero in each .o file since each .o file can only have - // one compile unit for now. + // User zero as the ID to match the compile unit at offset zero in each + // .o file since each .o file can only have one compile unit for now. lldb::user_id_t cu_id = 0; m_compile_unit_infos[cu_idx].compile_unit_sp.reset( new CompileUnit(m_obj_file->GetModule(), NULL, so_file_spec, cu_id, @@ -767,8 +763,8 @@ uint32_t SymbolFileDWARFDebugMap::ResolveSymbolContext( const uint32_t cu_count = GetNumCompileUnits(); for (uint32_t i = 0; i < cu_count; ++i) { - // If we are checking for inlines, then we need to look through all - // compile units no matter if "file_spec" matches. + // If we are checking for inlines, then we need to look through all compile + // units no matter if "file_spec" matches. bool resolve = check_inlines; if (!resolve) { @@ -823,8 +819,8 @@ uint32_t SymbolFileDWARFDebugMap::FindGlobalVariables( if (!append) variables.Clear(); - // Remember how many variables are in the list before we search in case - // we are appending the results to a variable list. + // Remember how many variables are in the list before we search in case we + // are appending the results to a variable list. const uint32_t original_size = variables.GetSize(); uint32_t total_matches = 0; @@ -843,8 +839,8 @@ uint32_t SymbolFileDWARFDebugMap::FindGlobalVariables( if (max_matches >= total_matches) return true; - // Update the max matches for any subsequent calls to find globals - // in any other object files with DWARF + // Update the max matches for any subsequent calls to find globals in any + // other object files with DWARF max_matches -= oso_matches; } @@ -863,8 +859,8 @@ SymbolFileDWARFDebugMap::FindGlobalVariables(const RegularExpression ®ex, if (!append) variables.Clear(); - // Remember how many variables are in the list before we search in case - // we are appending the results to a variable list. + // Remember how many variables are in the list before we search in case we + // are appending the results to a variable list. const uint32_t original_size = variables.GetSize(); uint32_t total_matches = 0; @@ -882,8 +878,8 @@ SymbolFileDWARFDebugMap::FindGlobalVariables(const RegularExpression ®ex, if (max_matches >= total_matches) return true; - // Update the max matches for any subsequent calls to find globals - // in any other object files with DWARF + // Update the max matches for any subsequent calls to find globals in any + // other object files with DWARF max_matches -= oso_matches; } @@ -965,12 +961,12 @@ SymbolFileDWARFDebugMap::GetCompileUnitInfoForSymbolWithID( static void RemoveFunctionsWithModuleNotEqualTo(const ModuleSP &module_sp, SymbolContextList &sc_list, uint32_t start_idx) { - // We found functions in .o files. Not all functions in the .o files - // will have made it into the final output file. The ones that did - // make it into the final output file will have a section whose module - // matches the module from the ObjectFile for this SymbolFile. When - // the modules don't match, then we have something that was in a - // .o file, but doesn't map to anything in the final executable. + // We found functions in .o files. Not all functions in the .o files will + // have made it into the final output file. The ones that did make it into + // the final output file will have a section whose module matches the module + // from the ObjectFile for this SymbolFile. When the modules don't match, + // then we have something that was in a .o file, but doesn't map to anything + // in the final executable. uint32_t i = start_idx; while (i < sc_list.GetSize()) { SymbolContext sc; @@ -1105,8 +1101,8 @@ TypeSP SymbolFileDWARFDebugMap::FindCompleteObjCDefinitionTypeForDIE( // the type name and whose type is eSymbolTypeObjCClass. If we can find that // symbol and find its containing parent, we can locate the .o file that will // contain the implementation definition since it will be scoped inside the - // N_SO - // and we can then locate the SymbolFileDWARF that corresponds to that N_SO. + // N_SO and we can then locate the SymbolFileDWARF that corresponds to that + // N_SO. SymbolFileDWARF *oso_dwarf = NULL; TypeSP type_sp; ObjectFile *module_objfile = m_obj_file->GetModule()->GetObjectFile(); @@ -1118,8 +1114,7 @@ TypeSP SymbolFileDWARFDebugMap::FindCompleteObjCDefinitionTypeForDIE( Symtab::eVisibilityAny); if (objc_class_symbol) { // Get the N_SO symbol that contains the objective C class symbol as - // this - // should be the .o file that contains the real definition... + // this should be the .o file that contains the real definition... const Symbol *source_file_symbol = symtab->GetParent(objc_class_symbol); if (source_file_symbol && @@ -1147,10 +1142,8 @@ TypeSP SymbolFileDWARFDebugMap::FindCompleteObjCDefinitionTypeForDIE( } // Only search all .o files for the definition if we don't need the - // implementation - // because otherwise, with a valid debug map we should have the ObjC class - // symbol and - // the code above should have found it. + // implementation because otherwise, with a valid debug map we should have + // the ObjC class symbol and the code above should have found it. if (must_be_implementation == false) { TypeSP type_sp; |
