SymbolFileDWARFDebugMap.cpp revision e6d72ca9a6b22cd062136bbff039c3d8217f798a
1//===-- SymbolFileDWARFDebugMap.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 "SymbolFileDWARFDebugMap.h" 11 12#include "lldb/Core/Module.h" 13#include "lldb/Core/ModuleList.h" 14#include "lldb/Core/PluginManager.h" 15#include "lldb/Core/RegularExpression.h" 16#include "lldb/Core/StreamFile.h" 17#include "lldb/Core/Timer.h" 18 19#include "lldb/Symbol/ClangExternalASTSourceCallbacks.h" 20#include "lldb/Symbol/ObjectFile.h" 21#include "lldb/Symbol/SymbolVendor.h" 22#include "lldb/Symbol/VariableList.h" 23 24#include "SymbolFileDWARF.h" 25 26using namespace lldb; 27using namespace lldb_private; 28 29void 30SymbolFileDWARFDebugMap::Initialize() 31{ 32 PluginManager::RegisterPlugin (GetPluginNameStatic(), 33 GetPluginDescriptionStatic(), 34 CreateInstance); 35} 36 37void 38SymbolFileDWARFDebugMap::Terminate() 39{ 40 PluginManager::UnregisterPlugin (CreateInstance); 41} 42 43 44const char * 45SymbolFileDWARFDebugMap::GetPluginNameStatic() 46{ 47 return "symbol-file.dwarf2-debugmap"; 48} 49 50const char * 51SymbolFileDWARFDebugMap::GetPluginDescriptionStatic() 52{ 53 return "DWARF and DWARF3 debug symbol file reader (debug map)."; 54} 55 56SymbolFile* 57SymbolFileDWARFDebugMap::CreateInstance (ObjectFile* obj_file) 58{ 59 return new SymbolFileDWARFDebugMap (obj_file); 60} 61 62 63SymbolFileDWARFDebugMap::SymbolFileDWARFDebugMap (ObjectFile* ofile) : 64 SymbolFile(ofile), 65 m_flags(), 66 m_compile_unit_infos(), 67 m_func_indexes(), 68 m_glob_indexes() 69{ 70} 71 72 73SymbolFileDWARFDebugMap::~SymbolFileDWARFDebugMap() 74{ 75} 76 77void 78SymbolFileDWARFDebugMap::InitializeObject() 79{ 80 // Install our external AST source callbacks so we can complete Clang types. 81 llvm::OwningPtr<clang::ExternalASTSource> ast_source_ap ( 82 new ClangExternalASTSourceCallbacks (SymbolFileDWARFDebugMap::CompleteTagDecl, 83 SymbolFileDWARFDebugMap::CompleteObjCInterfaceDecl, 84 NULL, 85 this)); 86 87 GetClangASTContext().SetExternalSource (ast_source_ap); 88} 89 90 91 92void 93SymbolFileDWARFDebugMap::InitOSO () 94{ 95 if (m_flags.test(kHaveInitializedOSOs)) 96 return; 97 98 m_flags.set(kHaveInitializedOSOs); 99 // In order to get the abilities of this plug-in, we look at the list of 100 // N_OSO entries (object files) from the symbol table and make sure that 101 // these files exist and also contain valid DWARF. If we get any of that 102 // then we return the abilities of the first N_OSO's DWARF. 103 104 Symtab* symtab = m_obj_file->GetSymtab(); 105 if (symtab) 106 { 107 std::vector<uint32_t> oso_indexes; 108// StreamFile s(stdout); 109// symtab->Dump(&s, NULL, eSortOrderNone); 110 111 // When a mach-o symbol is encoded, the n_type field is encoded in bits 112 // 23:16, and the n_desc field is encoded in bits 15:0. 113 // 114 // To find all N_OSO entries that are part of the DWARF + debug map 115 // we find only object file symbols with the flags value as follows: 116 // bits 23:16 == 0x66 (N_OSO) 117 // bits 15: 0 == 0x0001 (specifies this is a debug map object file) 118 const uint32_t k_oso_symbol_flags_value = 0x660001u; 119 120 const uint32_t oso_index_count = symtab->AppendSymbolIndexesWithTypeAndFlagsValue(eSymbolTypeObjectFile, k_oso_symbol_flags_value, oso_indexes); 121 122 if (oso_index_count > 0) 123 { 124 symtab->AppendSymbolIndexesWithType (eSymbolTypeCode, Symtab::eDebugYes, Symtab::eVisibilityAny, m_func_indexes); 125 symtab->AppendSymbolIndexesWithType (eSymbolTypeData, Symtab::eDebugYes, Symtab::eVisibilityAny, m_glob_indexes); 126 127 symtab->SortSymbolIndexesByValue(m_func_indexes, true); 128 symtab->SortSymbolIndexesByValue(m_glob_indexes, true); 129 130 m_compile_unit_infos.resize(oso_index_count); 131// s.Printf("%s N_OSO symbols:\n", __PRETTY_FUNCTION__); 132// symtab->Dump(&s, oso_indexes); 133 134 for (uint32_t i=0; i<oso_index_count; ++i) 135 { 136 m_compile_unit_infos[i].so_symbol = symtab->SymbolAtIndex(oso_indexes[i] - 1); 137 if (m_compile_unit_infos[i].so_symbol->GetSiblingIndex() == 0) 138 m_compile_unit_infos[i].so_symbol = symtab->SymbolAtIndex(oso_indexes[i] - 2); 139 m_compile_unit_infos[i].oso_symbol = symtab->SymbolAtIndex(oso_indexes[i]); 140 uint32_t sibling_idx = m_compile_unit_infos[i].so_symbol->GetSiblingIndex(); 141 assert (sibling_idx != 0); 142 assert (sibling_idx > i + 1); 143 m_compile_unit_infos[i].last_symbol = symtab->SymbolAtIndex (sibling_idx - 1); 144 m_compile_unit_infos[i].first_symbol_index = symtab->GetIndexForSymbol(m_compile_unit_infos[i].so_symbol); 145 m_compile_unit_infos[i].last_symbol_index = symtab->GetIndexForSymbol(m_compile_unit_infos[i].last_symbol); 146 } 147 } 148 } 149} 150 151Module * 152SymbolFileDWARFDebugMap::GetModuleByOSOIndex (uint32_t oso_idx) 153{ 154 const uint32_t cu_count = GetNumCompileUnits(); 155 if (oso_idx < cu_count) 156 return GetModuleByCompUnitInfo (&m_compile_unit_infos[oso_idx]); 157 return NULL; 158} 159 160Module * 161SymbolFileDWARFDebugMap::GetModuleByCompUnitInfo (CompileUnitInfo *comp_unit_info) 162{ 163 if (comp_unit_info->oso_module_sp.get() == NULL) 164 { 165 Symbol *oso_symbol = comp_unit_info->oso_symbol; 166 if (oso_symbol) 167 { 168 FileSpec oso_file_spec(oso_symbol->GetMangled().GetName().AsCString(), true); 169 // Don't allow cached .o files since we dress up each .o file with 170 // new sections. We want them to be in the module list so we can 171 // always find a shared pointer to the module (in Module::GetSP()), 172 // but just don't share them. 173 const bool always_create = true; 174 ModuleList::GetSharedModule (oso_file_spec, 175 m_obj_file->GetModule()->GetArchitecture(), 176 NULL, // lldb_private::UUID pointer 177 NULL, // object name 178 0, // object offset 179 comp_unit_info->oso_module_sp, 180 NULL, 181 NULL, 182 always_create); 183 } 184 } 185 return comp_unit_info->oso_module_sp.get(); 186} 187 188 189bool 190SymbolFileDWARFDebugMap::GetFileSpecForSO (uint32_t oso_idx, FileSpec &file_spec) 191{ 192 if (oso_idx < m_compile_unit_infos.size()) 193 { 194 if (!m_compile_unit_infos[oso_idx].so_file) 195 { 196 197 if (m_compile_unit_infos[oso_idx].so_symbol == NULL) 198 return false; 199 200 std::string so_path (m_compile_unit_infos[oso_idx].so_symbol->GetMangled().GetName().AsCString()); 201 if (m_compile_unit_infos[oso_idx].so_symbol[1].GetType() == eSymbolTypeSourceFile) 202 so_path += m_compile_unit_infos[oso_idx].so_symbol[1].GetMangled().GetName().AsCString(); 203 m_compile_unit_infos[oso_idx].so_file.SetFile(so_path.c_str(), true); 204 } 205 file_spec = m_compile_unit_infos[oso_idx].so_file; 206 return true; 207 } 208 return false; 209} 210 211 212 213ObjectFile * 214SymbolFileDWARFDebugMap::GetObjectFileByOSOIndex (uint32_t oso_idx) 215{ 216 Module *oso_module = GetModuleByOSOIndex (oso_idx); 217 if (oso_module) 218 return oso_module->GetObjectFile(); 219 return NULL; 220} 221 222SymbolFileDWARF * 223SymbolFileDWARFDebugMap::GetSymbolFile (const SymbolContext& sc) 224{ 225 CompileUnitInfo *comp_unit_info = GetCompUnitInfo (sc); 226 if (comp_unit_info) 227 return GetSymbolFileByCompUnitInfo (comp_unit_info); 228 return NULL; 229} 230 231ObjectFile * 232SymbolFileDWARFDebugMap::GetObjectFileByCompUnitInfo (CompileUnitInfo *comp_unit_info) 233{ 234 Module *oso_module = GetModuleByCompUnitInfo (comp_unit_info); 235 if (oso_module) 236 return oso_module->GetObjectFile(); 237 return NULL; 238} 239 240SymbolFileDWARF * 241SymbolFileDWARFDebugMap::GetSymbolFileByOSOIndex (uint32_t oso_idx) 242{ 243 if (oso_idx < m_compile_unit_infos.size()) 244 return GetSymbolFileByCompUnitInfo (&m_compile_unit_infos[oso_idx]); 245 return NULL; 246} 247 248SymbolFileDWARF * 249SymbolFileDWARFDebugMap::GetSymbolFileByCompUnitInfo (CompileUnitInfo *comp_unit_info) 250{ 251 if (comp_unit_info->oso_symbol_vendor == NULL) 252 { 253 ObjectFile *oso_objfile = GetObjectFileByCompUnitInfo (comp_unit_info); 254 255 if (oso_objfile) 256 { 257 comp_unit_info->oso_symbol_vendor = oso_objfile->GetModule()->GetSymbolVendor(); 258// SymbolFileDWARF *oso_dwarf = new SymbolFileDWARF(oso_objfile); 259// comp_unit_info->oso_dwarf_sp.reset (oso_dwarf); 260 if (comp_unit_info->oso_symbol_vendor) 261 { 262 // Set a a pointer to this class to set our OSO DWARF file know 263 // that the DWARF is being used along with a debug map and that 264 // it will have the remapped sections that we do below. 265 ((SymbolFileDWARF *)comp_unit_info->oso_symbol_vendor->GetSymbolFile())->SetDebugMapSymfile(this); 266 comp_unit_info->debug_map_sections_sp.reset(new SectionList); 267 268 Symtab *exe_symtab = m_obj_file->GetSymtab(); 269 Module *oso_module = oso_objfile->GetModule(); 270 Symtab *oso_symtab = oso_objfile->GetSymtab(); 271//#define DEBUG_OSO_DMAP // Do not check in with this defined... 272#if defined(DEBUG_OSO_DMAP) 273 StreamFile s(stdout); 274 s << "OSO symtab:\n"; 275 oso_symtab->Dump(&s, NULL); 276 s << "OSO sections before:\n"; 277 oso_objfile->GetSectionList()->Dump(&s, NULL, true); 278#endif 279 280 ///const uint32_t fun_resolve_flags = SymbolContext::Module | eSymbolContextCompUnit | eSymbolContextFunction; 281 //SectionList *oso_sections = oso_objfile->Sections(); 282 // Now we need to make sections that map from zero based object 283 // file addresses to where things eneded up in the main executable. 284 uint32_t oso_start_idx = exe_symtab->GetIndexForSymbol (comp_unit_info->oso_symbol); 285 assert (oso_start_idx != UINT32_MAX); 286 oso_start_idx += 1; 287 const uint32_t oso_end_idx = comp_unit_info->so_symbol->GetSiblingIndex(); 288 uint32_t sect_id = 0x10000; 289 for (uint32_t idx = oso_start_idx; idx < oso_end_idx; ++idx) 290 { 291 Symbol *exe_symbol = exe_symtab->SymbolAtIndex(idx); 292 if (exe_symbol) 293 { 294 if (exe_symbol->IsDebug() == false) 295 continue; 296 297 switch (exe_symbol->GetType()) 298 { 299 default: 300 break; 301 302 case eSymbolTypeCode: 303 { 304 // For each N_FUN, or function that we run into in the debug map 305 // we make a new section that we add to the sections found in the 306 // .o file. This new section has the file address set to what the 307 // addresses are in the .o file, and the load address is adjusted 308 // to match where it ended up in the final executable! We do this 309 // before we parse any dwarf info so that when it goes get parsed 310 // all section/offset addresses that get registered will resolve 311 // correctly to the new addresses in the main executable. 312 313 // First we find the original symbol in the .o file's symbol table 314 Symbol *oso_fun_symbol = oso_symtab->FindFirstSymbolWithNameAndType(exe_symbol->GetMangled().GetName(Mangled::ePreferMangled), eSymbolTypeCode, Symtab::eDebugNo, Symtab::eVisibilityAny); 315 if (oso_fun_symbol) 316 { 317 // If we found the symbol, then we 318 Section* exe_fun_section = const_cast<Section *>(exe_symbol->GetAddressRangePtr()->GetBaseAddress().GetSection()); 319 Section* oso_fun_section = const_cast<Section *>(oso_fun_symbol->GetAddressRangePtr()->GetBaseAddress().GetSection()); 320 if (oso_fun_section) 321 { 322 // Now we create a section that we will add as a child of the 323 // section in which the .o symbol (the N_FUN) exists. 324 325 // We use the exe_symbol size because the one in the .o file 326 // will just be a symbol with no size, and the exe_symbol 327 // size will reflect any size changes (ppc has been known to 328 // shrink function sizes when it gets rid of jump islands that 329 // aren't needed anymore). 330 SectionSP oso_fun_section_sp (new Section (const_cast<Section *>(oso_fun_symbol->GetAddressRangePtr()->GetBaseAddress().GetSection()), 331 oso_module, // Module (the .o file) 332 sect_id++, // Section ID starts at 0x10000 and increments so the section IDs don't overlap with the standard mach IDs 333 exe_symbol->GetMangled().GetName(Mangled::ePreferMangled), // Name the section the same as the symbol for which is was generated! 334 eSectionTypeDebug, 335 oso_fun_symbol->GetAddressRangePtr()->GetBaseAddress().GetOffset(), // File VM address offset in the current section 336 exe_symbol->GetByteSize(), // File size (we need the size from the executable) 337 0, 0, 0)); 338 339 oso_fun_section_sp->SetLinkedLocation (exe_fun_section, 340 exe_symbol->GetValue().GetFileAddress() - exe_fun_section->GetFileAddress()); 341 oso_fun_section->GetChildren().AddSection(oso_fun_section_sp); 342 comp_unit_info->debug_map_sections_sp->AddSection(oso_fun_section_sp); 343 } 344 } 345 } 346 break; 347 348 case eSymbolTypeData: 349 { 350 // For each N_GSYM we remap the address for the global by making 351 // a new section that we add to the sections found in the .o file. 352 // This new section has the file address set to what the 353 // addresses are in the .o file, and the load address is adjusted 354 // to match where it ended up in the final executable! We do this 355 // before we parse any dwarf info so that when it goes get parsed 356 // all section/offset addresses that get registered will resolve 357 // correctly to the new addresses in the main executable. We 358 // initially set the section size to be 1 byte, but will need to 359 // fix up these addresses further after all globals have been 360 // parsed to span the gaps, or we can find the global variable 361 // sizes from the DWARF info as we are parsing. 362 363#if 0 364 // First we find the non-stab entry that corresponds to the N_GSYM in the executable 365 Symbol *exe_gsym_symbol = exe_symtab->FindFirstSymbolWithNameAndType(exe_symbol->GetMangled().GetName(Mangled::ePreferMangled), eSymbolTypeData, Symtab::eDebugNo, Symtab::eVisibilityAny); 366#else 367 // The mach-o object file parser already matches up the N_GSYM with with the non-stab 368 // entry, so we shouldn't have to do that. If this ever changes, enable the code above 369 // in the "#if 0" block. STSYM's always match the symbol as found below. 370 Symbol *exe_gsym_symbol = exe_symbol; 371#endif 372 // Next we find the non-stab entry that corresponds to the N_GSYM in the .o file 373 Symbol *oso_gsym_symbol = oso_symtab->FindFirstSymbolWithNameAndType(exe_symbol->GetMangled().GetName(), eSymbolTypeData, Symtab::eDebugNo, Symtab::eVisibilityAny); 374 if (exe_gsym_symbol && oso_gsym_symbol && exe_gsym_symbol->GetAddressRangePtr() && oso_gsym_symbol->GetAddressRangePtr()) 375 { 376 // If we found the symbol, then we 377 Section* exe_gsym_section = const_cast<Section *>(exe_gsym_symbol->GetAddressRangePtr()->GetBaseAddress().GetSection()); 378 Section* oso_gsym_section = const_cast<Section *>(oso_gsym_symbol->GetAddressRangePtr()->GetBaseAddress().GetSection()); 379 if (oso_gsym_section) 380 { 381 SectionSP oso_gsym_section_sp (new Section (const_cast<Section *>(oso_gsym_symbol->GetAddressRangePtr()->GetBaseAddress().GetSection()), 382 oso_module, // Module (the .o file) 383 sect_id++, // Section ID starts at 0x10000 and increments so the section IDs don't overlap with the standard mach IDs 384 exe_symbol->GetMangled().GetName(Mangled::ePreferMangled), // Name the section the same as the symbol for which is was generated! 385 eSectionTypeDebug, 386 oso_gsym_symbol->GetAddressRangePtr()->GetBaseAddress().GetOffset(), // File VM address offset in the current section 387 1, // We don't know the size of the global, just do the main address for now. 388 0, 0, 0)); 389 390 oso_gsym_section_sp->SetLinkedLocation (exe_gsym_section, 391 exe_gsym_symbol->GetValue().GetFileAddress() - exe_gsym_section->GetFileAddress()); 392 oso_gsym_section->GetChildren().AddSection(oso_gsym_section_sp); 393 comp_unit_info->debug_map_sections_sp->AddSection(oso_gsym_section_sp); 394 } 395 } 396 } 397 break; 398 399// case eSymbolTypeStatic: 400// { 401// // For each N_STSYM we remap the address for the global by making 402// // a new section that we add to the sections found in the .o file. 403// // This new section has the file address set to what the 404// // addresses are in the .o file, and the load address is adjusted 405// // to match where it ended up in the final executable! We do this 406// // before we parse any dwarf info so that when it goes get parsed 407// // all section/offset addresses that get registered will resolve 408// // correctly to the new addresses in the main executable. We 409// // initially set the section size to be 1 byte, but will need to 410// // fix up these addresses further after all globals have been 411// // parsed to span the gaps, or we can find the global variable 412// // sizes from the DWARF info as we are parsing. 413// 414// 415// Symbol *exe_stsym_symbol = exe_symbol; 416// // First we find the non-stab entry that corresponds to the N_STSYM in the .o file 417// Symbol *oso_stsym_symbol = oso_symtab->FindFirstSymbolWithNameAndType(exe_symbol->GetMangled().GetName(), eSymbolTypeData); 418// if (exe_stsym_symbol && oso_stsym_symbol) 419// { 420// // If we found the symbol, then we 421// Section* exe_stsym_section = const_cast<Section *>(exe_stsym_symbol->GetAddressRangePtr()->GetBaseAddress().GetSection()); 422// Section* oso_stsym_section = const_cast<Section *>(oso_stsym_symbol->GetAddressRangePtr()->GetBaseAddress().GetSection()); 423// if (oso_stsym_section) 424// { 425// // The load address of the symbol will use the section in the 426// // executable that contains the debug map that corresponds to 427// // the N_FUN symbol. We set the offset to reflect the offset 428// // into that section since we are creating a new section. 429// AddressRange stsym_load_range(exe_stsym_section, exe_stsym_symbol->GetValue().GetFileAddress() - exe_stsym_section->GetFileAddress(), 1); 430// // We need the symbol's section offset address from the .o file, but 431// // we need a non-zero size. 432// AddressRange stsym_file_range(exe_stsym_symbol->GetAddressRangePtr()->GetBaseAddress().GetSection(), exe_stsym_symbol->GetAddressRangePtr()->GetBaseAddress().GetOffset(), 1); 433// 434// // Now we create a section that we will add as a child of the 435// // section in which the .o symbol (the N_FUN) exists. 436// 437//// TODO: mimic what I did for N_FUN if that works... 438//// // We use the 1 byte for the size because we don't know the 439//// // size of the global symbol without seeing the DWARF. 440//// SectionSP oso_fun_section_sp (new Section ( NULL, oso_module, // Module (the .o file) 441//// sect_id++, // Section ID starts at 0x10000 and increments so the section IDs don't overlap with the standard mach IDs 442//// exe_symbol->GetMangled().GetName(),// Name the section the same as the symbol for which is was generated! 443//// // &stsym_load_range, // Load offset is the offset into the executable section for the N_FUN from the debug map 444//// &stsym_file_range, // File section/offset is just the same os the symbol on the .o file 445//// 0, 0, 0)); 446//// 447//// // Now we add the new section to the .o file's sections as a child 448//// // of the section in which the N_SECT symbol exists. 449//// oso_stsym_section->GetChildren().AddSection(oso_fun_section_sp); 450//// comp_unit_info->debug_map_sections_sp->AddSection(oso_fun_section_sp); 451// } 452// } 453// } 454// break; 455 } 456 } 457 } 458#if defined(DEBUG_OSO_DMAP) 459 s << "OSO sections after:\n"; 460 oso_objfile->GetSectionList()->Dump(&s, NULL, true); 461#endif 462 } 463 } 464 } 465 if (comp_unit_info->oso_symbol_vendor) 466 return (SymbolFileDWARF *)comp_unit_info->oso_symbol_vendor->GetSymbolFile(); 467 return NULL; 468} 469 470uint32_t 471SymbolFileDWARFDebugMap::GetAbilities () 472{ 473 // In order to get the abilities of this plug-in, we look at the list of 474 // N_OSO entries (object files) from the symbol table and make sure that 475 // these files exist and also contain valid DWARF. If we get any of that 476 // then we return the abilities of the first N_OSO's DWARF. 477 478 const uint32_t oso_index_count = GetNumCompileUnits(); 479 if (oso_index_count > 0) 480 { 481 const uint32_t dwarf_abilities = SymbolFile::CompileUnits | 482 SymbolFile::Functions | 483 SymbolFile::Blocks | 484 SymbolFile::GlobalVariables | 485 SymbolFile::LocalVariables | 486 SymbolFile::VariableTypes | 487 SymbolFile::LineTables; 488 489 for (uint32_t oso_idx=0; oso_idx<oso_index_count; ++oso_idx) 490 { 491 SymbolFileDWARF *oso_dwarf = GetSymbolFileByOSOIndex (oso_idx); 492 if (oso_dwarf) 493 { 494 uint32_t oso_abilities = oso_dwarf->GetAbilities(); 495 if ((oso_abilities & dwarf_abilities) == dwarf_abilities) 496 return oso_abilities; 497 } 498 } 499 } 500 return 0; 501} 502 503uint32_t 504SymbolFileDWARFDebugMap::GetNumCompileUnits() 505{ 506 InitOSO (); 507 return m_compile_unit_infos.size(); 508} 509 510 511CompUnitSP 512SymbolFileDWARFDebugMap::ParseCompileUnitAtIndex(uint32_t cu_idx) 513{ 514 CompUnitSP comp_unit_sp; 515 const uint32_t cu_count = GetNumCompileUnits(); 516 517 if (cu_idx < cu_count) 518 { 519 if (m_compile_unit_infos[cu_idx].oso_compile_unit_sp.get() == NULL) 520 { 521 SymbolFileDWARF *oso_dwarf = GetSymbolFileByOSOIndex (cu_idx); 522 if (oso_dwarf) 523 { 524 // There is only one compile unit for N_OSO entry right now, so 525 // it will always exist at index zero. 526 m_compile_unit_infos[cu_idx].oso_compile_unit_sp = m_compile_unit_infos[cu_idx].oso_symbol_vendor->GetCompileUnitAtIndex (0); 527 } 528 529 if (m_compile_unit_infos[cu_idx].oso_compile_unit_sp.get() == NULL) 530 { 531 // We weren't able to get the DWARF for this N_OSO entry (the 532 // .o file may be missing or not at the specified path), make 533 // one up as best we can from the debug map. We set the uid 534 // of the compile unit to the symbol index with the MSBit set 535 // so that it doesn't collide with any uid values from the DWARF 536 Symbol *so_symbol = m_compile_unit_infos[cu_idx].so_symbol; 537 if (so_symbol) 538 { 539 m_compile_unit_infos[cu_idx].oso_compile_unit_sp.reset(new CompileUnit (m_obj_file->GetModule(), 540 NULL, 541 so_symbol->GetMangled().GetName().AsCString(), 542 cu_idx, 543 eLanguageTypeUnknown)); 544 545 // Let our symbol vendor know about this compile unit 546 m_obj_file->GetModule()->GetSymbolVendor()->SetCompileUnitAtIndex (m_compile_unit_infos[cu_idx].oso_compile_unit_sp, 547 cu_idx); 548 } 549 } 550 } 551 comp_unit_sp = m_compile_unit_infos[cu_idx].oso_compile_unit_sp; 552 } 553 554 return comp_unit_sp; 555} 556 557SymbolFileDWARFDebugMap::CompileUnitInfo * 558SymbolFileDWARFDebugMap::GetCompUnitInfo (const SymbolContext& sc) 559{ 560 const uint32_t cu_count = GetNumCompileUnits(); 561 for (uint32_t i=0; i<cu_count; ++i) 562 { 563 if (sc.comp_unit == m_compile_unit_infos[i].oso_compile_unit_sp.get()) 564 return &m_compile_unit_infos[i]; 565 } 566 return NULL; 567} 568 569size_t 570SymbolFileDWARFDebugMap::ParseCompileUnitFunctions (const SymbolContext& sc) 571{ 572 SymbolFileDWARF *oso_dwarf = GetSymbolFile (sc); 573 if (oso_dwarf) 574 return oso_dwarf->ParseCompileUnitFunctions (sc); 575 return 0; 576} 577 578bool 579SymbolFileDWARFDebugMap::ParseCompileUnitLineTable (const SymbolContext& sc) 580{ 581 SymbolFileDWARF *oso_dwarf = GetSymbolFile (sc); 582 if (oso_dwarf) 583 return oso_dwarf->ParseCompileUnitLineTable (sc); 584 return false; 585} 586 587bool 588SymbolFileDWARFDebugMap::ParseCompileUnitSupportFiles (const SymbolContext& sc, FileSpecList &support_files) 589{ 590 SymbolFileDWARF *oso_dwarf = GetSymbolFile (sc); 591 if (oso_dwarf) 592 return oso_dwarf->ParseCompileUnitSupportFiles (sc, support_files); 593 return false; 594} 595 596 597size_t 598SymbolFileDWARFDebugMap::ParseFunctionBlocks (const SymbolContext& sc) 599{ 600 SymbolFileDWARF *oso_dwarf = GetSymbolFile (sc); 601 if (oso_dwarf) 602 return oso_dwarf->ParseFunctionBlocks (sc); 603 return 0; 604} 605 606 607size_t 608SymbolFileDWARFDebugMap::ParseTypes (const SymbolContext& sc) 609{ 610 SymbolFileDWARF *oso_dwarf = GetSymbolFile (sc); 611 if (oso_dwarf) 612 return oso_dwarf->ParseTypes (sc); 613 return 0; 614} 615 616 617size_t 618SymbolFileDWARFDebugMap::ParseVariablesForContext (const SymbolContext& sc) 619{ 620 SymbolFileDWARF *oso_dwarf = GetSymbolFile (sc); 621 if (oso_dwarf) 622 return oso_dwarf->ParseTypes (sc); 623 return 0; 624} 625 626 627 628Type* 629SymbolFileDWARFDebugMap::ResolveTypeUID(lldb::user_id_t type_uid) 630{ 631 return NULL; 632} 633 634lldb::clang_type_t 635SymbolFileDWARFDebugMap::ResolveClangOpaqueTypeDefinition (lldb::clang_type_t clang_Type) 636{ 637 // We have a struct/union/class/enum that needs to be fully resolved. 638 return NULL; 639} 640 641uint32_t 642SymbolFileDWARFDebugMap::ResolveSymbolContext (const Address& exe_so_addr, uint32_t resolve_scope, SymbolContext& sc) 643{ 644 uint32_t resolved_flags = 0; 645 Symtab* symtab = m_obj_file->GetSymtab(); 646 if (symtab) 647 { 648 const addr_t exe_file_addr = exe_so_addr.GetFileAddress(); 649 sc.symbol = symtab->FindSymbolContainingFileAddress (exe_file_addr, &m_func_indexes[0], m_func_indexes.size()); 650 651 if (sc.symbol != NULL) 652 { 653 resolved_flags |= eSymbolContextSymbol; 654 655 uint32_t oso_idx = 0; 656 CompileUnitInfo* comp_unit_info = GetCompileUnitInfoForSymbolWithID (sc.symbol->GetID(), &oso_idx); 657 if (comp_unit_info) 658 { 659 SymbolFileDWARF *oso_dwarf = GetSymbolFileByOSOIndex (oso_idx); 660 ObjectFile *oso_objfile = GetObjectFileByOSOIndex (oso_idx); 661 if (oso_dwarf && oso_objfile) 662 { 663 SectionList *oso_section_list = oso_objfile->GetSectionList(); 664 665 SectionSP oso_symbol_section_sp (oso_section_list->FindSectionContainingLinkedFileAddress (exe_file_addr, UINT32_MAX)); 666 667 if (oso_symbol_section_sp) 668 { 669 const addr_t linked_file_addr = oso_symbol_section_sp->GetLinkedFileAddress(); 670 Address oso_so_addr (oso_symbol_section_sp.get(), exe_file_addr - linked_file_addr); 671 if (oso_so_addr.IsSectionOffset()) 672 resolved_flags |= oso_dwarf->ResolveSymbolContext (oso_so_addr, resolve_scope, sc); 673 } 674 } 675 } 676 } 677 } 678 return resolved_flags; 679} 680 681 682uint32_t 683SymbolFileDWARFDebugMap::ResolveSymbolContext (const FileSpec& file_spec, uint32_t line, bool check_inlines, uint32_t resolve_scope, SymbolContextList& sc_list) 684{ 685 uint32_t initial = sc_list.GetSize(); 686 const uint32_t cu_count = GetNumCompileUnits(); 687 688 FileSpec so_file_spec; 689 for (uint32_t i=0; i<cu_count; ++i) 690 { 691 if (GetFileSpecForSO (i, so_file_spec)) 692 { 693 // By passing false to the comparison we will be able to match 694 // and files given a filename only. If both file_spec and 695 // so_file_spec have directories, we will still do a full match. 696 if (FileSpec::Compare (file_spec, so_file_spec, false) == 0) 697 { 698 SymbolFileDWARF *oso_dwarf = GetSymbolFileByOSOIndex (i); 699 700 oso_dwarf->ResolveSymbolContext(file_spec, line, check_inlines, resolve_scope, sc_list); 701 } 702 } 703 } 704 return sc_list.GetSize() - initial; 705} 706 707uint32_t 708SymbolFileDWARFDebugMap::PrivateFindGlobalVariables 709( 710 const ConstString &name, 711 const std::vector<uint32_t> &indexes, // Indexes into the symbol table that match "name" 712 uint32_t max_matches, 713 VariableList& variables 714) 715{ 716 const uint32_t original_size = variables.GetSize(); 717 const size_t match_count = indexes.size(); 718 for (size_t i=0; i<match_count; ++i) 719 { 720 uint32_t oso_idx; 721 CompileUnitInfo* comp_unit_info = GetCompileUnitInfoForSymbolWithIndex (indexes[i], &oso_idx); 722 if (comp_unit_info) 723 { 724 SymbolFileDWARF *oso_dwarf = GetSymbolFileByOSOIndex (oso_idx); 725 if (oso_dwarf) 726 { 727 if (oso_dwarf->FindGlobalVariables(name, true, max_matches, variables)) 728 if (variables.GetSize() > max_matches) 729 break; 730 } 731 } 732 } 733 return variables.GetSize() - original_size; 734} 735 736uint32_t 737SymbolFileDWARFDebugMap::FindGlobalVariables (const ConstString &name, bool append, uint32_t max_matches, VariableList& variables) 738{ 739 740 // If we aren't appending the results to this list, then clear the list 741 if (!append) 742 variables.Clear(); 743 744 // Remember how many variables are in the list before we search in case 745 // we are appending the results to a variable list. 746 const uint32_t original_size = variables.GetSize(); 747 748 uint32_t total_matches = 0; 749 SymbolFileDWARF *oso_dwarf; 750 for (uint32_t oso_idx = 0; ((oso_dwarf = GetSymbolFileByOSOIndex (oso_idx)) != NULL); ++oso_idx) 751 { 752 const uint32_t oso_matches = oso_dwarf->FindGlobalVariables (name, 753 true, 754 max_matches, 755 variables); 756 if (oso_matches > 0) 757 { 758 total_matches += oso_matches; 759 760 // Are we getting all matches? 761 if (max_matches == UINT32_MAX) 762 continue; // Yep, continue getting everything 763 764 // If we have found enough matches, lets get out 765 if (max_matches >= total_matches) 766 break; 767 768 // Update the max matches for any subsequent calls to find globals 769 // in any other object files with DWARF 770 max_matches -= oso_matches; 771 } 772 } 773 // Return the number of variable that were appended to the list 774 return variables.GetSize() - original_size; 775} 776 777 778uint32_t 779SymbolFileDWARFDebugMap::FindGlobalVariables (const RegularExpression& regex, bool append, uint32_t max_matches, VariableList& variables) 780{ 781 // If we aren't appending the results to this list, then clear the list 782 if (!append) 783 variables.Clear(); 784 785 // Remember how many variables are in the list before we search in case 786 // we are appending the results to a variable list. 787 const uint32_t original_size = variables.GetSize(); 788 789 uint32_t total_matches = 0; 790 SymbolFileDWARF *oso_dwarf; 791 for (uint32_t oso_idx = 0; ((oso_dwarf = GetSymbolFileByOSOIndex (oso_idx)) != NULL); ++oso_idx) 792 { 793 const uint32_t oso_matches = oso_dwarf->FindGlobalVariables (regex, 794 true, 795 max_matches, 796 variables); 797 if (oso_matches > 0) 798 { 799 total_matches += oso_matches; 800 801 // Are we getting all matches? 802 if (max_matches == UINT32_MAX) 803 continue; // Yep, continue getting everything 804 805 // If we have found enough matches, lets get out 806 if (max_matches >= total_matches) 807 break; 808 809 // Update the max matches for any subsequent calls to find globals 810 // in any other object files with DWARF 811 max_matches -= oso_matches; 812 } 813 } 814 // Return the number of variable that were appended to the list 815 return variables.GetSize() - original_size; 816} 817 818 819int 820SymbolFileDWARFDebugMap::SymbolContainsSymbolWithIndex (uint32_t *symbol_idx_ptr, const CompileUnitInfo *comp_unit_info) 821{ 822 const uint32_t symbol_idx = *symbol_idx_ptr; 823 824 if (symbol_idx < comp_unit_info->first_symbol_index) 825 return -1; 826 827 if (symbol_idx <= comp_unit_info->last_symbol_index) 828 return 0; 829 830 return 1; 831} 832 833 834int 835SymbolFileDWARFDebugMap::SymbolContainsSymbolWithID (user_id_t *symbol_idx_ptr, const CompileUnitInfo *comp_unit_info) 836{ 837 const user_id_t symbol_id = *symbol_idx_ptr; 838 839 if (symbol_id < comp_unit_info->so_symbol->GetID()) 840 return -1; 841 842 if (symbol_id <= comp_unit_info->last_symbol->GetID()) 843 return 0; 844 845 return 1; 846} 847 848 849SymbolFileDWARFDebugMap::CompileUnitInfo* 850SymbolFileDWARFDebugMap::GetCompileUnitInfoForSymbolWithIndex (uint32_t symbol_idx, uint32_t *oso_idx_ptr) 851{ 852 const uint32_t oso_index_count = m_compile_unit_infos.size(); 853 CompileUnitInfo *comp_unit_info = NULL; 854 if (oso_index_count) 855 { 856 comp_unit_info = (CompileUnitInfo*)bsearch(&symbol_idx, 857 &m_compile_unit_infos[0], 858 m_compile_unit_infos.size(), 859 sizeof(CompileUnitInfo), 860 (ComparisonFunction)SymbolContainsSymbolWithIndex); 861 } 862 863 if (oso_idx_ptr) 864 { 865 if (comp_unit_info != NULL) 866 *oso_idx_ptr = comp_unit_info - &m_compile_unit_infos[0]; 867 else 868 *oso_idx_ptr = UINT32_MAX; 869 } 870 return comp_unit_info; 871} 872 873SymbolFileDWARFDebugMap::CompileUnitInfo* 874SymbolFileDWARFDebugMap::GetCompileUnitInfoForSymbolWithID (user_id_t symbol_id, uint32_t *oso_idx_ptr) 875{ 876 const uint32_t oso_index_count = m_compile_unit_infos.size(); 877 CompileUnitInfo *comp_unit_info = NULL; 878 if (oso_index_count) 879 { 880 comp_unit_info = (CompileUnitInfo*)::bsearch (&symbol_id, 881 &m_compile_unit_infos[0], 882 m_compile_unit_infos.size(), 883 sizeof(CompileUnitInfo), 884 (ComparisonFunction)SymbolContainsSymbolWithID); 885 } 886 887 if (oso_idx_ptr) 888 { 889 if (comp_unit_info != NULL) 890 *oso_idx_ptr = comp_unit_info - &m_compile_unit_infos[0]; 891 else 892 *oso_idx_ptr = UINT32_MAX; 893 } 894 return comp_unit_info; 895} 896 897 898static void 899RemoveFunctionsWithModuleNotEqualTo (Module *module, SymbolContextList &sc_list, uint32_t start_idx) 900{ 901 // We found functions in .o files. Not all functions in the .o files 902 // will have made it into the final output file. The ones that did 903 // make it into the final output file will have a section whose module 904 // matches the module from the ObjectFile for this SymbolFile. When 905 // the modules don't match, then we have something that was in a 906 // .o file, but doesn't map to anything in the final executable. 907 uint32_t i=start_idx; 908 while (i < sc_list.GetSize()) 909 { 910 SymbolContext sc; 911 sc_list.GetContextAtIndex(i, sc); 912 if (sc.function) 913 { 914 const Section *section = sc.function->GetAddressRange().GetBaseAddress().GetSection(); 915 if (section->GetModule() != module) 916 { 917 sc_list.RemoveContextAtIndex(i); 918 continue; 919 } 920 } 921 ++i; 922 } 923} 924 925uint32_t 926SymbolFileDWARFDebugMap::FindFunctions(const ConstString &name, uint32_t name_type_mask, bool append, SymbolContextList& sc_list) 927{ 928 Timer scoped_timer (__PRETTY_FUNCTION__, 929 "SymbolFileDWARFDebugMap::FindFunctions (name = %s)", 930 name.GetCString()); 931 932 uint32_t initial_size = 0; 933 if (append) 934 initial_size = sc_list.GetSize(); 935 else 936 sc_list.Clear(); 937 938 uint32_t oso_idx = 0; 939 SymbolFileDWARF *oso_dwarf; 940 while ((oso_dwarf = GetSymbolFileByOSOIndex (oso_idx++)) != NULL) 941 { 942 uint32_t sc_idx = sc_list.GetSize(); 943 if (oso_dwarf->FindFunctions(name, name_type_mask, true, sc_list)) 944 { 945 RemoveFunctionsWithModuleNotEqualTo (m_obj_file->GetModule(), sc_list, sc_idx); 946 } 947 } 948 949 return sc_list.GetSize() - initial_size; 950} 951 952 953uint32_t 954SymbolFileDWARFDebugMap::FindFunctions (const RegularExpression& regex, bool append, SymbolContextList& sc_list) 955{ 956 Timer scoped_timer (__PRETTY_FUNCTION__, 957 "SymbolFileDWARFDebugMap::FindFunctions (regex = '%s')", 958 regex.GetText()); 959 960 uint32_t initial_size = 0; 961 if (append) 962 initial_size = sc_list.GetSize(); 963 else 964 sc_list.Clear(); 965 966 uint32_t oso_idx = 0; 967 SymbolFileDWARF *oso_dwarf; 968 while ((oso_dwarf = GetSymbolFileByOSOIndex (oso_idx++)) != NULL) 969 { 970 uint32_t sc_idx = sc_list.GetSize(); 971 972 if (oso_dwarf->FindFunctions(regex, true, sc_list)) 973 { 974 RemoveFunctionsWithModuleNotEqualTo (m_obj_file->GetModule(), sc_list, sc_idx); 975 } 976 } 977 978 return sc_list.GetSize() - initial_size; 979} 980 981TypeSP 982SymbolFileDWARFDebugMap::FindDefinitionTypeForDIE ( 983 DWARFCompileUnit* cu, 984 const DWARFDebugInfoEntry *die, 985 const ConstString &type_name 986) 987{ 988 TypeSP type_sp; 989 SymbolFileDWARF *oso_dwarf; 990 for (uint32_t oso_idx = 0; ((oso_dwarf = GetSymbolFileByOSOIndex (oso_idx)) != NULL); ++oso_idx) 991 { 992 type_sp = oso_dwarf->FindDefinitionTypeForDIE (cu, die, type_name); 993 if (type_sp) 994 break; 995 } 996 return type_sp; 997} 998 999uint32_t 1000SymbolFileDWARFDebugMap::FindTypes 1001( 1002 const SymbolContext& sc, 1003 const ConstString &name, 1004 bool append, 1005 uint32_t max_matches, 1006 TypeList& types 1007) 1008{ 1009 if (!append) 1010 types.Clear(); 1011 1012 const uint32_t initial_types_size = types.GetSize(); 1013 SymbolFileDWARF *oso_dwarf; 1014 1015 if (sc.comp_unit) 1016 { 1017 oso_dwarf = GetSymbolFile (sc); 1018 if (oso_dwarf) 1019 return oso_dwarf->FindTypes (sc, name, append, max_matches, types); 1020 } 1021 else 1022 { 1023 uint32_t oso_idx = 0; 1024 while ((oso_dwarf = GetSymbolFileByOSOIndex (oso_idx++)) != NULL) 1025 oso_dwarf->FindTypes (sc, name, append, max_matches, types); 1026 } 1027 1028 return types.GetSize() - initial_types_size; 1029} 1030 1031// 1032//uint32_t 1033//SymbolFileDWARFDebugMap::FindTypes (const SymbolContext& sc, const RegularExpression& regex, bool append, uint32_t max_matches, Type::Encoding encoding, lldb::user_id_t udt_uid, TypeList& types) 1034//{ 1035// SymbolFileDWARF *oso_dwarf = GetSymbolFile (sc); 1036// if (oso_dwarf) 1037// return oso_dwarf->FindTypes (sc, regex, append, max_matches, encoding, udt_uid, types); 1038// return 0; 1039//} 1040 1041 1042ClangNamespaceDecl 1043SymbolFileDWARFDebugMap::FindNamespace (const lldb_private::SymbolContext& sc, 1044 const lldb_private::ConstString &name) 1045{ 1046 ClangNamespaceDecl matching_namespace; 1047 SymbolFileDWARF *oso_dwarf; 1048 1049 if (sc.comp_unit) 1050 { 1051 oso_dwarf = GetSymbolFile (sc); 1052 if (oso_dwarf) 1053 matching_namespace = oso_dwarf->FindNamespace (sc, name); 1054 } 1055 else 1056 { 1057 for (uint32_t oso_idx = 0; 1058 ((oso_dwarf = GetSymbolFileByOSOIndex (oso_idx)) != NULL); 1059 ++oso_idx) 1060 { 1061 matching_namespace = oso_dwarf->FindNamespace (sc, name); 1062 1063 if (matching_namespace) 1064 break; 1065 } 1066 } 1067 1068 return matching_namespace; 1069} 1070 1071//------------------------------------------------------------------ 1072// PluginInterface protocol 1073//------------------------------------------------------------------ 1074const char * 1075SymbolFileDWARFDebugMap::GetPluginName() 1076{ 1077 return "SymbolFileDWARFDebugMap"; 1078} 1079 1080const char * 1081SymbolFileDWARFDebugMap::GetShortPluginName() 1082{ 1083 return GetPluginNameStatic(); 1084} 1085 1086uint32_t 1087SymbolFileDWARFDebugMap::GetPluginVersion() 1088{ 1089 return 1; 1090} 1091 1092void 1093SymbolFileDWARFDebugMap::SetCompileUnit (SymbolFileDWARF *oso_dwarf, const CompUnitSP &cu_sp) 1094{ 1095 const uint32_t cu_count = GetNumCompileUnits(); 1096 for (uint32_t i=0; i<cu_count; ++i) 1097 { 1098 if (m_compile_unit_infos[i].oso_symbol_vendor && 1099 m_compile_unit_infos[i].oso_symbol_vendor->GetSymbolFile() == oso_dwarf) 1100 { 1101 if (m_compile_unit_infos[i].oso_compile_unit_sp) 1102 { 1103 assert (m_compile_unit_infos[i].oso_compile_unit_sp.get() == cu_sp.get()); 1104 } 1105 else 1106 { 1107 m_compile_unit_infos[i].oso_compile_unit_sp = cu_sp; 1108 } 1109 } 1110 } 1111} 1112 1113 1114void 1115SymbolFileDWARFDebugMap::CompleteTagDecl (void *baton, clang::TagDecl *decl) 1116{ 1117 SymbolFileDWARFDebugMap *symbol_file_dwarf = (SymbolFileDWARFDebugMap *)baton; 1118 clang_type_t clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl); 1119 if (clang_type) 1120 { 1121 SymbolFileDWARF *oso_dwarf; 1122 1123 for (uint32_t oso_idx = 0; ((oso_dwarf = symbol_file_dwarf->GetSymbolFileByOSOIndex (oso_idx)) != NULL); ++oso_idx) 1124 { 1125 if (oso_dwarf->HasForwardDeclForClangType (clang_type)) 1126 { 1127 oso_dwarf->ResolveClangOpaqueTypeDefinition (clang_type); 1128 return; 1129 } 1130 } 1131 } 1132} 1133 1134void 1135SymbolFileDWARFDebugMap::CompleteObjCInterfaceDecl (void *baton, clang::ObjCInterfaceDecl *decl) 1136{ 1137 SymbolFileDWARFDebugMap *symbol_file_dwarf = (SymbolFileDWARFDebugMap *)baton; 1138 clang_type_t clang_type = symbol_file_dwarf->GetClangASTContext().GetTypeForDecl (decl); 1139 if (clang_type) 1140 { 1141 SymbolFileDWARF *oso_dwarf; 1142 1143 for (uint32_t oso_idx = 0; ((oso_dwarf = symbol_file_dwarf->GetSymbolFileByOSOIndex (oso_idx)) != NULL); ++oso_idx) 1144 { 1145 if (oso_dwarf->HasForwardDeclForClangType (clang_type)) 1146 { 1147 oso_dwarf->ResolveClangOpaqueTypeDefinition (clang_type); 1148 return; 1149 } 1150 } 1151 } 1152} 1153 1154