1 //===-- SourceManager.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/Core/SourceManager.h" 11 12 // C Includes 13 // C++ Includes 14 // Other libraries and framework includes 15 // Project includes 16 #include "lldb/Core/DataBuffer.h" 17 #include "lldb/Core/Debugger.h" 18 #include "lldb/Core/Stream.h" 19 #include "lldb/Symbol/ClangNamespaceDecl.h" 20 #include "lldb/Symbol/SymbolContext.h" 21 #include "lldb/Target/Target.h" 22 23 using namespace lldb_private; 24 25 static inline bool is_newline_char(char ch) 26 { 27 return ch == '\n' || ch == '\r'; 28 } 29 30 31 //---------------------------------------------------------------------- 32 // SourceManager constructor 33 //---------------------------------------------------------------------- 34 SourceManager::SourceManager(Target &target) : 35 m_last_file_sp (), 36 m_last_file_line (0), 37 m_last_file_context_before (0), 38 m_last_file_context_after (10), 39 m_default_set(false), 40 m_target (&target), 41 m_debugger(NULL) 42 { 43 m_debugger = &(m_target->GetDebugger()); 44 } 45 46 SourceManager::SourceManager(Debugger &debugger) : 47 m_last_file_sp (), 48 m_last_file_line (0), 49 m_last_file_context_before (0), 50 m_last_file_context_after (10), 51 m_default_set(false), 52 m_target (NULL), 53 m_debugger (&debugger) 54 { 55 } 56 57 //---------------------------------------------------------------------- 58 // Destructor 59 //---------------------------------------------------------------------- 60 SourceManager::~SourceManager() 61 { 62 } 63 64 size_t 65 SourceManager::DisplaySourceLines 66 ( 67 const FileSpec &file_spec, 68 uint32_t line, 69 uint32_t context_before, 70 uint32_t context_after, 71 Stream *s 72 ) 73 { 74 m_last_file_sp = GetFile (file_spec); 75 m_last_file_line = line + context_after + 1; 76 m_last_file_context_before = context_before; 77 m_last_file_context_after = context_after; 78 if (m_last_file_sp.get()) 79 return m_last_file_sp->DisplaySourceLines (line, context_before, context_after, s); 80 81 return 0; 82 } 83 84 SourceManager::FileSP 85 SourceManager::GetFile (const FileSpec &file_spec) 86 { 87 FileSP file_sp; 88 file_sp = m_debugger->GetSourceFileCache().FindSourceFile (file_spec); 89 if (!file_sp) 90 { 91 file_sp.reset (new File (file_spec, m_target)); 92 93 m_debugger->GetSourceFileCache().AddSourceFile(file_sp); 94 } 95 return file_sp; 96 } 97 98 size_t 99 SourceManager::DisplaySourceLinesWithLineNumbersUsingLastFile 100 ( 101 uint32_t line, 102 uint32_t context_before, 103 uint32_t context_after, 104 const char* current_line_cstr, 105 Stream *s, 106 const SymbolContextList *bp_locs 107 ) 108 { 109 size_t return_value = 0; 110 if (line == 0) 111 { 112 if (m_last_file_line != 0 113 && m_last_file_line != UINT32_MAX) 114 line = m_last_file_line + context_before; 115 else 116 line = 1; 117 } 118 119 m_last_file_line = line + context_after + 1; 120 m_last_file_context_before = context_before; 121 m_last_file_context_after = context_after; 122 123 if (context_before == UINT32_MAX) 124 context_before = 0; 125 if (context_after == UINT32_MAX) 126 context_after = 10; 127 128 if (m_last_file_sp.get()) 129 { 130 const uint32_t start_line = line <= context_before ? 1 : line - context_before; 131 const uint32_t end_line = line + context_after; 132 uint32_t curr_line; 133 for (curr_line = start_line; curr_line <= end_line; ++curr_line) 134 { 135 if (!m_last_file_sp->LineIsValid (curr_line)) 136 { 137 m_last_file_line = UINT32_MAX; 138 break; 139 } 140 141 char prefix[32] = ""; 142 if (bp_locs) 143 { 144 uint32_t bp_count = bp_locs->NumLineEntriesWithLine (curr_line); 145 146 if (bp_count > 0) 147 ::snprintf (prefix, sizeof (prefix), "[%u] ", bp_count); 148 else 149 ::snprintf (prefix, sizeof (prefix), " "); 150 } 151 152 return_value += s->Printf("%s%2.2s %-4u\t", 153 prefix, 154 curr_line == line ? current_line_cstr : "", 155 curr_line); 156 size_t this_line_size = m_last_file_sp->DisplaySourceLines (curr_line, 0, 0, s); 157 if (this_line_size == 0) 158 { 159 m_last_file_line = UINT32_MAX; 160 break; 161 } 162 else 163 return_value += this_line_size; 164 } 165 } 166 return return_value; 167 } 168 169 size_t 170 SourceManager::DisplaySourceLinesWithLineNumbers 171 ( 172 const FileSpec &file_spec, 173 uint32_t line, 174 uint32_t context_before, 175 uint32_t context_after, 176 const char* current_line_cstr, 177 Stream *s, 178 const SymbolContextList *bp_locs 179 ) 180 { 181 bool same_as_previous = m_last_file_sp && m_last_file_sp->FileSpecMatches (file_spec); 182 183 if (!same_as_previous) 184 m_last_file_sp = GetFile (file_spec); 185 186 if (line == 0) 187 { 188 if (!same_as_previous) 189 m_last_file_line = 0; 190 } 191 192 return DisplaySourceLinesWithLineNumbersUsingLastFile (line, context_before, context_after, current_line_cstr, s, bp_locs); 193 } 194 195 size_t 196 SourceManager::DisplayMoreWithLineNumbers (Stream *s, const SymbolContextList *bp_locs) 197 { 198 if (m_last_file_sp) 199 { 200 if (m_last_file_line == UINT32_MAX) 201 return 0; 202 return DisplaySourceLinesWithLineNumbersUsingLastFile (0, m_last_file_context_before, m_last_file_context_after, "", s, bp_locs); 203 } 204 return 0; 205 } 206 207 bool 208 SourceManager::SetDefaultFileAndLine (const FileSpec &file_spec, uint32_t line) 209 { 210 FileSP old_file_sp = m_last_file_sp; 211 m_last_file_sp = GetFile (file_spec); 212 213 m_default_set = true; 214 if (m_last_file_sp) 215 { 216 m_last_file_line = line; 217 return true; 218 } 219 else 220 { 221 m_last_file_sp = old_file_sp; 222 return false; 223 } 224 } 225 226 bool 227 SourceManager::GetDefaultFileAndLine (FileSpec &file_spec, uint32_t &line) 228 { 229 if (m_last_file_sp) 230 { 231 file_spec = m_last_file_sp->GetFileSpec(); 232 line = m_last_file_line; 233 return true; 234 } 235 else if (!m_default_set) 236 { 237 // If nobody has set the default file and line then try here. If there's no executable, then we 238 // will try again later when there is one. Otherwise, if we can't find it we won't look again, 239 // somebody will have to set it (for instance when we stop somewhere...) 240 Module *executable_ptr = m_target->GetExecutableModulePointer(); 241 if (executable_ptr) 242 { 243 SymbolContextList sc_list; 244 uint32_t num_matches; 245 ConstString main_name("main"); 246 bool symbols_okay = false; // Force it to be a debug symbol. 247 bool append = false; 248 num_matches = executable_ptr->FindFunctions (main_name, NULL, lldb::eFunctionNameTypeBase, symbols_okay, append, sc_list); 249 for (uint32_t idx = 0; idx < num_matches; idx++) 250 { 251 SymbolContext sc; 252 sc_list.GetContextAtIndex(idx, sc); 253 if (sc.line_entry.file) 254 { 255 SetDefaultFileAndLine(sc.line_entry.file, sc.line_entry.line); 256 break; 257 } 258 } 259 return GetDefaultFileAndLine (file_spec, line); 260 } 261 else 262 return false; 263 } 264 else 265 return false; 266 } 267 268 void 269 SourceManager::FindLinesMatchingRegex (FileSpec &file_spec, 270 RegularExpression& regex, 271 uint32_t start_line, 272 uint32_t end_line, 273 std::vector<uint32_t> &match_lines) 274 { 275 match_lines.clear(); 276 FileSP file_sp = GetFile (file_spec); 277 if (!file_sp) 278 return; 279 return file_sp->FindLinesMatchingRegex (regex, start_line, end_line, match_lines); 280 } 281 282 SourceManager::File::File(const FileSpec &file_spec, Target *target) : 283 m_file_spec_orig (file_spec), 284 m_file_spec(file_spec), 285 m_mod_time (file_spec.GetModificationTime()), 286 m_data_sp(), 287 m_offsets() 288 { 289 if (!m_mod_time.IsValid()) 290 { 291 if (target) 292 { 293 if (!file_spec.GetDirectory() && file_spec.GetFilename()) 294 { 295 // If this is just a file name, lets see if we can find it in the target: 296 bool check_inlines = false; 297 SymbolContextList sc_list; 298 size_t num_matches = target->GetImages().ResolveSymbolContextForFilePath (file_spec.GetFilename().AsCString(), 299 0, 300 check_inlines, 301 lldb::eSymbolContextModule | lldb::eSymbolContextCompUnit, 302 sc_list); 303 bool got_multiple = false; 304 if (num_matches != 0) 305 { 306 if (num_matches > 1) 307 { 308 SymbolContext sc; 309 FileSpec *test_cu_spec = NULL; 310 311 for (unsigned i = 0; i < num_matches; i++) 312 { 313 sc_list.GetContextAtIndex(i, sc); 314 if (sc.comp_unit) 315 { 316 if (test_cu_spec) 317 { 318 if (test_cu_spec != static_cast<FileSpec *> (sc.comp_unit)) 319 got_multiple = true; 320 break; 321 } 322 else 323 test_cu_spec = sc.comp_unit; 324 } 325 } 326 } 327 if (!got_multiple) 328 { 329 SymbolContext sc; 330 sc_list.GetContextAtIndex (0, sc); 331 m_file_spec = static_cast<FileSpec *>(sc.comp_unit); 332 m_mod_time = m_file_spec.GetModificationTime(); 333 } 334 } 335 } 336 else 337 { 338 if (target->GetSourcePathMap().RemapPath(file_spec.GetDirectory(), m_file_spec.GetDirectory())) 339 m_mod_time = file_spec.GetModificationTime(); 340 } 341 } 342 } 343 344 if (m_mod_time.IsValid()) 345 m_data_sp = m_file_spec.ReadFileContents (); 346 } 347 348 SourceManager::File::~File() 349 { 350 } 351 352 uint32_t 353 SourceManager::File::GetLineOffset (uint32_t line) 354 { 355 if (line == 0) 356 return UINT32_MAX; 357 358 if (line == 1) 359 return 0; 360 361 if (CalculateLineOffsets (line)) 362 { 363 if (line < m_offsets.size()) 364 return m_offsets[line - 1]; // yes we want "line - 1" in the index 365 } 366 return UINT32_MAX; 367 } 368 369 bool 370 SourceManager::File::LineIsValid (uint32_t line) 371 { 372 if (line == 0) 373 return false; 374 375 if (CalculateLineOffsets (line)) 376 return line < m_offsets.size(); 377 return false; 378 } 379 380 size_t 381 SourceManager::File::DisplaySourceLines (uint32_t line, uint32_t context_before, uint32_t context_after, Stream *s) 382 { 383 // TODO: use host API to sign up for file modifications to anything in our 384 // source cache and only update when we determine a file has been updated. 385 // For now we check each time we want to display info for the file. 386 TimeValue curr_mod_time (m_file_spec.GetModificationTime()); 387 if (m_mod_time != curr_mod_time) 388 { 389 m_mod_time = curr_mod_time; 390 m_data_sp = m_file_spec.ReadFileContents (); 391 m_offsets.clear(); 392 } 393 394 const uint32_t start_line = line <= context_before ? 1 : line - context_before; 395 const uint32_t start_line_offset = GetLineOffset (start_line); 396 if (start_line_offset != UINT32_MAX) 397 { 398 const uint32_t end_line = line + context_after; 399 uint32_t end_line_offset = GetLineOffset (end_line + 1); 400 if (end_line_offset == UINT32_MAX) 401 end_line_offset = m_data_sp->GetByteSize(); 402 403 assert (start_line_offset <= end_line_offset); 404 size_t bytes_written = 0; 405 if (start_line_offset < end_line_offset) 406 { 407 size_t count = end_line_offset - start_line_offset; 408 const uint8_t *cstr = m_data_sp->GetBytes() + start_line_offset; 409 bytes_written = s->Write(cstr, count); 410 if (!is_newline_char(cstr[count-1])) 411 bytes_written += s->EOL(); 412 } 413 return bytes_written; 414 } 415 return 0; 416 } 417 418 void 419 SourceManager::File::FindLinesMatchingRegex (RegularExpression& regex, uint32_t start_line, uint32_t end_line, std::vector<uint32_t> &match_lines) 420 { 421 TimeValue curr_mod_time (m_file_spec.GetModificationTime()); 422 if (m_mod_time != curr_mod_time) 423 { 424 m_mod_time = curr_mod_time; 425 m_data_sp = m_file_spec.ReadFileContents (); 426 m_offsets.clear(); 427 } 428 429 match_lines.clear(); 430 431 if (!LineIsValid(start_line) || (end_line != UINT32_MAX && !LineIsValid(end_line))) 432 return; 433 if (start_line > end_line) 434 return; 435 436 for (uint32_t line_no = start_line; line_no < end_line; line_no++) 437 { 438 std::string buffer; 439 if (!GetLine (line_no, buffer)) 440 break; 441 if (regex.Execute(buffer.c_str())) 442 { 443 match_lines.push_back(line_no); 444 } 445 } 446 } 447 448 bool 449 SourceManager::File::FileSpecMatches (const FileSpec &file_spec) 450 { 451 return FileSpec::Equal (m_file_spec, file_spec, false); 452 } 453 454 bool 455 lldb_private::operator== (const SourceManager::File &lhs, const SourceManager::File &rhs) 456 { 457 if (lhs.m_file_spec == rhs.m_file_spec) 458 { 459 if (lhs.m_mod_time.IsValid()) 460 { 461 if (rhs.m_mod_time.IsValid()) 462 return lhs.m_mod_time == rhs.m_mod_time; 463 else 464 return false; 465 } 466 else if (rhs.m_mod_time.IsValid()) 467 return false; 468 else 469 return true; 470 } 471 else 472 return false; 473 } 474 475 bool 476 SourceManager::File::CalculateLineOffsets (uint32_t line) 477 { 478 line = UINT32_MAX; // TODO: take this line out when we support partial indexing 479 if (line == UINT32_MAX) 480 { 481 // Already done? 482 if (!m_offsets.empty() && m_offsets[0] == UINT32_MAX) 483 return true; 484 485 if (m_offsets.empty()) 486 { 487 if (m_data_sp.get() == NULL) 488 return false; 489 490 const char *start = (char *)m_data_sp->GetBytes(); 491 if (start) 492 { 493 const char *end = start + m_data_sp->GetByteSize(); 494 495 // Calculate all line offsets from scratch 496 497 // Push a 1 at index zero to indicate the file has been completely indexed. 498 m_offsets.push_back(UINT32_MAX); 499 register const char *s; 500 for (s = start; s < end; ++s) 501 { 502 register char curr_ch = *s; 503 if (is_newline_char (curr_ch)) 504 { 505 register char next_ch = s[1]; 506 if (is_newline_char (next_ch)) 507 { 508 if (curr_ch != next_ch) 509 ++s; 510 } 511 m_offsets.push_back(s + 1 - start); 512 } 513 } 514 if (!m_offsets.empty()) 515 { 516 if (m_offsets.back() < end - start) 517 m_offsets.push_back(end - start); 518 } 519 return true; 520 } 521 } 522 else 523 { 524 // Some lines have been populated, start where we last left off 525 assert(!"Not implemented yet"); 526 } 527 528 } 529 else 530 { 531 // Calculate all line offsets up to "line" 532 assert(!"Not implemented yet"); 533 } 534 return false; 535 } 536 537 bool 538 SourceManager::File::GetLine (uint32_t line_no, std::string &buffer) 539 { 540 if (!LineIsValid(line_no)) 541 return false; 542 543 uint32_t start_offset = GetLineOffset (line_no); 544 uint32_t end_offset = GetLineOffset (line_no + 1); 545 if (end_offset == UINT32_MAX) 546 { 547 end_offset = m_data_sp->GetByteSize(); 548 } 549 buffer.assign((char *) m_data_sp->GetBytes() + start_offset, end_offset - start_offset); 550 551 return true; 552 } 553 554 void 555 SourceManager::SourceFileCache::AddSourceFile (const FileSP &file_sp) 556 { 557 FileSpec file_spec; 558 FileCache::iterator pos = m_file_cache.find(file_spec); 559 if (pos == m_file_cache.end()) 560 m_file_cache[file_spec] = file_sp; 561 else 562 { 563 if (file_sp != pos->second) 564 m_file_cache[file_spec] = file_sp; 565 } 566 } 567 568 SourceManager::FileSP 569 SourceManager::SourceFileCache::FindSourceFile (const FileSpec &file_spec) const 570 { 571 FileSP file_sp; 572 FileCache::const_iterator pos = m_file_cache.find(file_spec); 573 if (pos != m_file_cache.end()) 574 file_sp = pos->second; 575 return file_sp; 576 } 577 578