1 //===-- SourceManager.cpp -------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "lldb/Core/SourceManager.h" 10 11 #include "lldb/Core/Address.h" 12 #include "lldb/Core/AddressRange.h" 13 #include "lldb/Core/Debugger.h" 14 #include "lldb/Core/FormatEntity.h" 15 #include "lldb/Core/Highlighter.h" 16 #include "lldb/Core/Module.h" 17 #include "lldb/Core/ModuleList.h" 18 #include "lldb/Host/FileSystem.h" 19 #include "lldb/Symbol/CompileUnit.h" 20 #include "lldb/Symbol/Function.h" 21 #include "lldb/Symbol/LineEntry.h" 22 #include "lldb/Symbol/SymbolContext.h" 23 #include "lldb/Target/PathMappingList.h" 24 #include "lldb/Target/Target.h" 25 #include "lldb/Utility/AnsiTerminal.h" 26 #include "lldb/Utility/ConstString.h" 27 #include "lldb/Utility/DataBuffer.h" 28 #include "lldb/Utility/DataBufferLLVM.h" 29 #include "lldb/Utility/RegularExpression.h" 30 #include "lldb/Utility/Stream.h" 31 #include "lldb/lldb-enumerations.h" 32 33 #include "llvm/ADT/Twine.h" 34 35 #include <memory> 36 #include <utility> 37 38 #include <assert.h> 39 #include <stdio.h> 40 41 namespace lldb_private { 42 class ExecutionContext; 43 } 44 namespace lldb_private { 45 class ValueObject; 46 } 47 48 using namespace lldb; 49 using namespace lldb_private; 50 51 static inline bool is_newline_char(char ch) { return ch == '\n' || ch == '\r'; } 52 53 // SourceManager constructor 54 SourceManager::SourceManager(const TargetSP &target_sp) 55 : m_last_line(0), m_last_count(0), m_default_set(false), 56 m_target_wp(target_sp), 57 m_debugger_wp(target_sp->GetDebugger().shared_from_this()) {} 58 59 SourceManager::SourceManager(const DebuggerSP &debugger_sp) 60 : m_last_line(0), m_last_count(0), m_default_set(false), m_target_wp(), 61 m_debugger_wp(debugger_sp) {} 62 63 // Destructor 64 SourceManager::~SourceManager() {} 65 66 SourceManager::FileSP SourceManager::GetFile(const FileSpec &file_spec) { 67 if (!file_spec) 68 return nullptr; 69 70 DebuggerSP debugger_sp(m_debugger_wp.lock()); 71 FileSP file_sp; 72 if (debugger_sp && debugger_sp->GetUseSourceCache()) 73 file_sp = debugger_sp->GetSourceFileCache().FindSourceFile(file_spec); 74 75 TargetSP target_sp(m_target_wp.lock()); 76 77 // It the target source path map has been updated, get this file again so we 78 // can successfully remap the source file 79 if (target_sp && file_sp && 80 file_sp->GetSourceMapModificationID() != 81 target_sp->GetSourcePathMap().GetModificationID()) 82 file_sp.reset(); 83 84 // Update the file contents if needed if we found a file 85 if (file_sp) 86 file_sp->UpdateIfNeeded(); 87 88 // If file_sp is no good or it points to a non-existent file, reset it. 89 if (!file_sp || !FileSystem::Instance().Exists(file_sp->GetFileSpec())) { 90 if (target_sp) 91 file_sp = std::make_shared<File>(file_spec, target_sp.get()); 92 else 93 file_sp = std::make_shared<File>(file_spec, debugger_sp); 94 95 if (debugger_sp && debugger_sp->GetUseSourceCache()) 96 debugger_sp->GetSourceFileCache().AddSourceFile(file_sp); 97 } 98 return file_sp; 99 } 100 101 static bool should_highlight_source(DebuggerSP debugger_sp) { 102 if (!debugger_sp) 103 return false; 104 105 // We don't use ANSI stop column formatting if the debugger doesn't think it 106 // should be using color. 107 if (!debugger_sp->GetUseColor()) 108 return false; 109 110 return debugger_sp->GetHighlightSource(); 111 } 112 113 static bool should_show_stop_column_with_ansi(DebuggerSP debugger_sp) { 114 // We don't use ANSI stop column formatting if we can't lookup values from 115 // the debugger. 116 if (!debugger_sp) 117 return false; 118 119 // We don't use ANSI stop column formatting if the debugger doesn't think it 120 // should be using color. 121 if (!debugger_sp->GetUseColor()) 122 return false; 123 124 // We only use ANSI stop column formatting if we're either supposed to show 125 // ANSI where available (which we know we have when we get to this point), or 126 // if we're only supposed to use ANSI. 127 const auto value = debugger_sp->GetStopShowColumn(); 128 return ((value == eStopShowColumnAnsiOrCaret) || 129 (value == eStopShowColumnAnsi)); 130 } 131 132 static bool should_show_stop_column_with_caret(DebuggerSP debugger_sp) { 133 // We don't use text-based stop column formatting if we can't lookup values 134 // from the debugger. 135 if (!debugger_sp) 136 return false; 137 138 // If we're asked to show the first available of ANSI or caret, then we do 139 // show the caret when ANSI is not available. 140 const auto value = debugger_sp->GetStopShowColumn(); 141 if ((value == eStopShowColumnAnsiOrCaret) && !debugger_sp->GetUseColor()) 142 return true; 143 144 // The only other time we use caret is if we're explicitly asked to show 145 // caret. 146 return value == eStopShowColumnCaret; 147 } 148 149 static bool should_show_stop_line_with_ansi(DebuggerSP debugger_sp) { 150 return debugger_sp && debugger_sp->GetUseColor(); 151 } 152 153 size_t SourceManager::DisplaySourceLinesWithLineNumbersUsingLastFile( 154 uint32_t start_line, uint32_t count, uint32_t curr_line, uint32_t column, 155 const char *current_line_cstr, Stream *s, 156 const SymbolContextList *bp_locs) { 157 if (count == 0) 158 return 0; 159 160 Stream::ByteDelta delta(*s); 161 162 if (start_line == 0) { 163 if (m_last_line != 0 && m_last_line != UINT32_MAX) 164 start_line = m_last_line + m_last_count; 165 else 166 start_line = 1; 167 } 168 169 if (!m_default_set) { 170 FileSpec tmp_spec; 171 uint32_t tmp_line; 172 GetDefaultFileAndLine(tmp_spec, tmp_line); 173 } 174 175 m_last_line = start_line; 176 m_last_count = count; 177 178 if (FileSP last_file_sp = GetLastFile()) { 179 const uint32_t end_line = start_line + count - 1; 180 for (uint32_t line = start_line; line <= end_line; ++line) { 181 if (!last_file_sp->LineIsValid(line)) { 182 m_last_line = UINT32_MAX; 183 break; 184 } 185 186 char prefix[32] = ""; 187 if (bp_locs) { 188 uint32_t bp_count = bp_locs->NumLineEntriesWithLine(line); 189 190 if (bp_count > 0) 191 ::snprintf(prefix, sizeof(prefix), "[%u] ", bp_count); 192 else 193 ::snprintf(prefix, sizeof(prefix), " "); 194 } 195 196 char buffer[3]; 197 sprintf(buffer, "%2.2s", (line == curr_line) ? current_line_cstr : ""); 198 std::string current_line_highlight(buffer); 199 200 auto debugger_sp = m_debugger_wp.lock(); 201 if (should_show_stop_line_with_ansi(debugger_sp)) { 202 current_line_highlight = ansi::FormatAnsiTerminalCodes( 203 (debugger_sp->GetStopShowLineMarkerAnsiPrefix() + 204 current_line_highlight + 205 debugger_sp->GetStopShowLineMarkerAnsiSuffix()) 206 .str()); 207 } 208 209 s->Printf("%s%s %-4u\t", prefix, current_line_highlight.c_str(), line); 210 211 // So far we treated column 0 as a special 'no column value', but 212 // DisplaySourceLines starts counting columns from 0 (and no column is 213 // expressed by passing an empty optional). 214 llvm::Optional<size_t> columnToHighlight; 215 if (line == curr_line && column) 216 columnToHighlight = column - 1; 217 218 size_t this_line_size = 219 last_file_sp->DisplaySourceLines(line, columnToHighlight, 0, 0, s); 220 if (column != 0 && line == curr_line && 221 should_show_stop_column_with_caret(debugger_sp)) { 222 // Display caret cursor. 223 std::string src_line; 224 last_file_sp->GetLine(line, src_line); 225 s->Printf(" \t"); 226 // Insert a space for every non-tab character in the source line. 227 for (size_t i = 0; i + 1 < column && i < src_line.length(); ++i) 228 s->PutChar(src_line[i] == '\t' ? '\t' : ' '); 229 // Now add the caret. 230 s->Printf("^\n"); 231 } 232 if (this_line_size == 0) { 233 m_last_line = UINT32_MAX; 234 break; 235 } 236 } 237 } 238 return *delta; 239 } 240 241 size_t SourceManager::DisplaySourceLinesWithLineNumbers( 242 const FileSpec &file_spec, uint32_t line, uint32_t column, 243 uint32_t context_before, uint32_t context_after, 244 const char *current_line_cstr, Stream *s, 245 const SymbolContextList *bp_locs) { 246 FileSP file_sp(GetFile(file_spec)); 247 248 uint32_t start_line; 249 uint32_t count = context_before + context_after + 1; 250 if (line > context_before) 251 start_line = line - context_before; 252 else 253 start_line = 1; 254 255 FileSP last_file_sp(GetLastFile()); 256 if (last_file_sp.get() != file_sp.get()) { 257 if (line == 0) 258 m_last_line = 0; 259 m_last_file_spec = file_spec; 260 } 261 return DisplaySourceLinesWithLineNumbersUsingLastFile( 262 start_line, count, line, column, current_line_cstr, s, bp_locs); 263 } 264 265 size_t SourceManager::DisplayMoreWithLineNumbers( 266 Stream *s, uint32_t count, bool reverse, const SymbolContextList *bp_locs) { 267 // If we get called before anybody has set a default file and line, then try 268 // to figure it out here. 269 FileSP last_file_sp(GetLastFile()); 270 const bool have_default_file_line = last_file_sp && m_last_line > 0; 271 if (!m_default_set) { 272 FileSpec tmp_spec; 273 uint32_t tmp_line; 274 GetDefaultFileAndLine(tmp_spec, tmp_line); 275 } 276 277 if (last_file_sp) { 278 if (m_last_line == UINT32_MAX) 279 return 0; 280 281 if (reverse && m_last_line == 1) 282 return 0; 283 284 if (count > 0) 285 m_last_count = count; 286 else if (m_last_count == 0) 287 m_last_count = 10; 288 289 if (m_last_line > 0) { 290 if (reverse) { 291 // If this is the first time we've done a reverse, then back up one 292 // more time so we end up showing the chunk before the last one we've 293 // shown: 294 if (m_last_line > m_last_count) 295 m_last_line -= m_last_count; 296 else 297 m_last_line = 1; 298 } else if (have_default_file_line) 299 m_last_line += m_last_count; 300 } else 301 m_last_line = 1; 302 303 const uint32_t column = 0; 304 return DisplaySourceLinesWithLineNumbersUsingLastFile( 305 m_last_line, m_last_count, UINT32_MAX, column, "", s, bp_locs); 306 } 307 return 0; 308 } 309 310 bool SourceManager::SetDefaultFileAndLine(const FileSpec &file_spec, 311 uint32_t line) { 312 m_default_set = true; 313 FileSP file_sp(GetFile(file_spec)); 314 315 if (file_sp) { 316 m_last_line = line; 317 m_last_file_spec = file_spec; 318 return true; 319 } else { 320 return false; 321 } 322 } 323 324 bool SourceManager::GetDefaultFileAndLine(FileSpec &file_spec, uint32_t &line) { 325 if (FileSP last_file_sp = GetLastFile()) { 326 file_spec = m_last_file_spec; 327 line = m_last_line; 328 return true; 329 } else if (!m_default_set) { 330 TargetSP target_sp(m_target_wp.lock()); 331 332 if (target_sp) { 333 // If nobody has set the default file and line then try here. If there's 334 // no executable, then we will try again later when there is one. 335 // Otherwise, if we can't find it we won't look again, somebody will have 336 // to set it (for instance when we stop somewhere...) 337 Module *executable_ptr = target_sp->GetExecutableModulePointer(); 338 if (executable_ptr) { 339 SymbolContextList sc_list; 340 ConstString main_name("main"); 341 bool symbols_okay = false; // Force it to be a debug symbol. 342 bool inlines_okay = true; 343 executable_ptr->FindFunctions(main_name, CompilerDeclContext(), 344 lldb::eFunctionNameTypeBase, inlines_okay, 345 symbols_okay, sc_list); 346 size_t num_matches = sc_list.GetSize(); 347 for (size_t idx = 0; idx < num_matches; idx++) { 348 SymbolContext sc; 349 sc_list.GetContextAtIndex(idx, sc); 350 if (sc.function) { 351 lldb_private::LineEntry line_entry; 352 if (sc.function->GetAddressRange() 353 .GetBaseAddress() 354 .CalculateSymbolContextLineEntry(line_entry)) { 355 SetDefaultFileAndLine(line_entry.file, line_entry.line); 356 file_spec = m_last_file_spec; 357 line = m_last_line; 358 return true; 359 } 360 } 361 } 362 } 363 } 364 } 365 return false; 366 } 367 368 void SourceManager::FindLinesMatchingRegex(FileSpec &file_spec, 369 RegularExpression ®ex, 370 uint32_t start_line, 371 uint32_t end_line, 372 std::vector<uint32_t> &match_lines) { 373 match_lines.clear(); 374 FileSP file_sp = GetFile(file_spec); 375 if (!file_sp) 376 return; 377 return file_sp->FindLinesMatchingRegex(regex, start_line, end_line, 378 match_lines); 379 } 380 381 SourceManager::File::File(const FileSpec &file_spec, 382 lldb::DebuggerSP debugger_sp) 383 : m_file_spec_orig(file_spec), m_file_spec(file_spec), 384 m_mod_time(FileSystem::Instance().GetModificationTime(file_spec)), 385 m_debugger_wp(debugger_sp) { 386 CommonInitializer(file_spec, nullptr); 387 } 388 389 SourceManager::File::File(const FileSpec &file_spec, Target *target) 390 : m_file_spec_orig(file_spec), m_file_spec(file_spec), 391 m_mod_time(FileSystem::Instance().GetModificationTime(file_spec)), 392 m_debugger_wp(target ? target->GetDebugger().shared_from_this() 393 : DebuggerSP()) { 394 CommonInitializer(file_spec, target); 395 } 396 397 void SourceManager::File::CommonInitializer(const FileSpec &file_spec, 398 Target *target) { 399 if (m_mod_time == llvm::sys::TimePoint<>()) { 400 if (target) { 401 m_source_map_mod_id = target->GetSourcePathMap().GetModificationID(); 402 403 if (!file_spec.GetDirectory() && file_spec.GetFilename()) { 404 // If this is just a file name, lets see if we can find it in the 405 // target: 406 bool check_inlines = false; 407 SymbolContextList sc_list; 408 size_t num_matches = 409 target->GetImages().ResolveSymbolContextForFilePath( 410 file_spec.GetFilename().AsCString(), 0, check_inlines, 411 SymbolContextItem(eSymbolContextModule | 412 eSymbolContextCompUnit), 413 sc_list); 414 bool got_multiple = false; 415 if (num_matches != 0) { 416 if (num_matches > 1) { 417 SymbolContext sc; 418 CompileUnit *test_cu = nullptr; 419 420 for (unsigned i = 0; i < num_matches; i++) { 421 sc_list.GetContextAtIndex(i, sc); 422 if (sc.comp_unit) { 423 if (test_cu) { 424 if (test_cu != sc.comp_unit) 425 got_multiple = true; 426 break; 427 } else 428 test_cu = sc.comp_unit; 429 } 430 } 431 } 432 if (!got_multiple) { 433 SymbolContext sc; 434 sc_list.GetContextAtIndex(0, sc); 435 if (sc.comp_unit) 436 m_file_spec = sc.comp_unit->GetPrimaryFile(); 437 m_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec); 438 } 439 } 440 } 441 // Try remapping if m_file_spec does not correspond to an existing file. 442 if (!FileSystem::Instance().Exists(m_file_spec)) { 443 FileSpec new_file_spec; 444 // Check target specific source remappings first, then fall back to 445 // modules objects can have individual path remappings that were 446 // detected when the debug info for a module was found. then 447 if (target->GetSourcePathMap().FindFile(m_file_spec, new_file_spec) || 448 target->GetImages().FindSourceFile(m_file_spec, new_file_spec)) { 449 m_file_spec = new_file_spec; 450 m_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec); 451 } 452 } 453 } 454 } 455 456 if (m_mod_time != llvm::sys::TimePoint<>()) 457 m_data_sp = FileSystem::Instance().CreateDataBuffer(m_file_spec); 458 } 459 460 uint32_t SourceManager::File::GetLineOffset(uint32_t line) { 461 if (line == 0) 462 return UINT32_MAX; 463 464 if (line == 1) 465 return 0; 466 467 if (CalculateLineOffsets(line)) { 468 if (line < m_offsets.size()) 469 return m_offsets[line - 1]; // yes we want "line - 1" in the index 470 } 471 return UINT32_MAX; 472 } 473 474 uint32_t SourceManager::File::GetNumLines() { 475 CalculateLineOffsets(); 476 return m_offsets.size(); 477 } 478 479 const char *SourceManager::File::PeekLineData(uint32_t line) { 480 if (!LineIsValid(line)) 481 return nullptr; 482 483 size_t line_offset = GetLineOffset(line); 484 if (line_offset < m_data_sp->GetByteSize()) 485 return (const char *)m_data_sp->GetBytes() + line_offset; 486 return nullptr; 487 } 488 489 uint32_t SourceManager::File::GetLineLength(uint32_t line, 490 bool include_newline_chars) { 491 if (!LineIsValid(line)) 492 return false; 493 494 size_t start_offset = GetLineOffset(line); 495 size_t end_offset = GetLineOffset(line + 1); 496 if (end_offset == UINT32_MAX) 497 end_offset = m_data_sp->GetByteSize(); 498 499 if (end_offset > start_offset) { 500 uint32_t length = end_offset - start_offset; 501 if (!include_newline_chars) { 502 const char *line_start = 503 (const char *)m_data_sp->GetBytes() + start_offset; 504 while (length > 0) { 505 const char last_char = line_start[length - 1]; 506 if ((last_char == '\r') || (last_char == '\n')) 507 --length; 508 else 509 break; 510 } 511 } 512 return length; 513 } 514 return 0; 515 } 516 517 bool SourceManager::File::LineIsValid(uint32_t line) { 518 if (line == 0) 519 return false; 520 521 if (CalculateLineOffsets(line)) 522 return line < m_offsets.size(); 523 return false; 524 } 525 526 void SourceManager::File::UpdateIfNeeded() { 527 // TODO: use host API to sign up for file modifications to anything in our 528 // source cache and only update when we determine a file has been updated. 529 // For now we check each time we want to display info for the file. 530 auto curr_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec); 531 532 if (curr_mod_time != llvm::sys::TimePoint<>() && 533 m_mod_time != curr_mod_time) { 534 m_mod_time = curr_mod_time; 535 m_data_sp = FileSystem::Instance().CreateDataBuffer(m_file_spec); 536 m_offsets.clear(); 537 } 538 } 539 540 size_t SourceManager::File::DisplaySourceLines(uint32_t line, 541 llvm::Optional<size_t> column, 542 uint32_t context_before, 543 uint32_t context_after, 544 Stream *s) { 545 // Nothing to write if there's no stream. 546 if (!s) 547 return 0; 548 549 // Sanity check m_data_sp before proceeding. 550 if (!m_data_sp) 551 return 0; 552 553 size_t bytes_written = s->GetWrittenBytes(); 554 555 auto debugger_sp = m_debugger_wp.lock(); 556 557 HighlightStyle style; 558 // Use the default Vim style if source highlighting is enabled. 559 if (should_highlight_source(debugger_sp)) 560 style = HighlightStyle::MakeVimStyle(); 561 562 // If we should mark the stop column with color codes, then copy the prefix 563 // and suffix to our color style. 564 if (should_show_stop_column_with_ansi(debugger_sp)) 565 style.selected.Set(debugger_sp->GetStopShowColumnAnsiPrefix(), 566 debugger_sp->GetStopShowColumnAnsiSuffix()); 567 568 HighlighterManager mgr; 569 std::string path = GetFileSpec().GetPath(/*denormalize*/ false); 570 // FIXME: Find a way to get the definitive language this file was written in 571 // and pass it to the highlighter. 572 const auto &h = mgr.getHighlighterFor(lldb::eLanguageTypeUnknown, path); 573 574 const uint32_t start_line = 575 line <= context_before ? 1 : line - context_before; 576 const uint32_t start_line_offset = GetLineOffset(start_line); 577 if (start_line_offset != UINT32_MAX) { 578 const uint32_t end_line = line + context_after; 579 uint32_t end_line_offset = GetLineOffset(end_line + 1); 580 if (end_line_offset == UINT32_MAX) 581 end_line_offset = m_data_sp->GetByteSize(); 582 583 assert(start_line_offset <= end_line_offset); 584 if (start_line_offset < end_line_offset) { 585 size_t count = end_line_offset - start_line_offset; 586 const uint8_t *cstr = m_data_sp->GetBytes() + start_line_offset; 587 588 auto ref = llvm::StringRef(reinterpret_cast<const char *>(cstr), count); 589 590 h.Highlight(style, ref, column, "", *s); 591 592 // Ensure we get an end of line character one way or another. 593 if (!is_newline_char(ref.back())) 594 s->EOL(); 595 } 596 } 597 return s->GetWrittenBytes() - bytes_written; 598 } 599 600 void SourceManager::File::FindLinesMatchingRegex( 601 RegularExpression ®ex, uint32_t start_line, uint32_t end_line, 602 std::vector<uint32_t> &match_lines) { 603 match_lines.clear(); 604 605 if (!LineIsValid(start_line) || 606 (end_line != UINT32_MAX && !LineIsValid(end_line))) 607 return; 608 if (start_line > end_line) 609 return; 610 611 for (uint32_t line_no = start_line; line_no < end_line; line_no++) { 612 std::string buffer; 613 if (!GetLine(line_no, buffer)) 614 break; 615 if (regex.Execute(buffer)) { 616 match_lines.push_back(line_no); 617 } 618 } 619 } 620 621 bool lldb_private::operator==(const SourceManager::File &lhs, 622 const SourceManager::File &rhs) { 623 if (lhs.m_file_spec != rhs.m_file_spec) 624 return false; 625 return lhs.m_mod_time == rhs.m_mod_time; 626 } 627 628 bool SourceManager::File::CalculateLineOffsets(uint32_t line) { 629 line = 630 UINT32_MAX; // TODO: take this line out when we support partial indexing 631 if (line == UINT32_MAX) { 632 // Already done? 633 if (!m_offsets.empty() && m_offsets[0] == UINT32_MAX) 634 return true; 635 636 if (m_offsets.empty()) { 637 if (m_data_sp.get() == nullptr) 638 return false; 639 640 const char *start = (char *)m_data_sp->GetBytes(); 641 if (start) { 642 const char *end = start + m_data_sp->GetByteSize(); 643 644 // Calculate all line offsets from scratch 645 646 // Push a 1 at index zero to indicate the file has been completely 647 // indexed. 648 m_offsets.push_back(UINT32_MAX); 649 const char *s; 650 for (s = start; s < end; ++s) { 651 char curr_ch = *s; 652 if (is_newline_char(curr_ch)) { 653 if (s + 1 < end) { 654 char next_ch = s[1]; 655 if (is_newline_char(next_ch)) { 656 if (curr_ch != next_ch) 657 ++s; 658 } 659 } 660 m_offsets.push_back(s + 1 - start); 661 } 662 } 663 if (!m_offsets.empty()) { 664 if (m_offsets.back() < size_t(end - start)) 665 m_offsets.push_back(end - start); 666 } 667 return true; 668 } 669 } else { 670 // Some lines have been populated, start where we last left off 671 assert("Not implemented yet" && false); 672 } 673 674 } else { 675 // Calculate all line offsets up to "line" 676 assert("Not implemented yet" && false); 677 } 678 return false; 679 } 680 681 bool SourceManager::File::GetLine(uint32_t line_no, std::string &buffer) { 682 if (!LineIsValid(line_no)) 683 return false; 684 685 size_t start_offset = GetLineOffset(line_no); 686 size_t end_offset = GetLineOffset(line_no + 1); 687 if (end_offset == UINT32_MAX) { 688 end_offset = m_data_sp->GetByteSize(); 689 } 690 buffer.assign((char *)m_data_sp->GetBytes() + start_offset, 691 end_offset - start_offset); 692 693 return true; 694 } 695 696 void SourceManager::SourceFileCache::AddSourceFile(const FileSP &file_sp) { 697 FileSpec file_spec = file_sp->GetFileSpec(); 698 FileCache::iterator pos = m_file_cache.find(file_spec); 699 if (pos == m_file_cache.end()) 700 m_file_cache[file_spec] = file_sp; 701 else { 702 if (file_sp != pos->second) 703 m_file_cache[file_spec] = file_sp; 704 } 705 } 706 707 SourceManager::FileSP SourceManager::SourceFileCache::FindSourceFile( 708 const FileSpec &file_spec) const { 709 FileSP file_sp; 710 FileCache::const_iterator pos = m_file_cache.find(file_spec); 711 if (pos != m_file_cache.end()) 712 file_sp = pos->second; 713 return file_sp; 714 } 715