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/RegularExpression.h" 29 #include "lldb/Utility/Stream.h" 30 #include "lldb/lldb-enumerations.h" 31 32 #include "llvm/ADT/Twine.h" 33 34 #include <memory> 35 #include <optional> 36 #include <utility> 37 38 #include <cassert> 39 #include <cstdio> 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 static void resolve_tilde(FileSpec &file_spec) { 54 if (!FileSystem::Instance().Exists(file_spec) && 55 file_spec.GetDirectory() && 56 file_spec.GetDirectory().GetCString()[0] == '~') { 57 FileSystem::Instance().Resolve(file_spec); 58 } 59 } 60 61 // SourceManager constructor 62 SourceManager::SourceManager(const TargetSP &target_sp) 63 : m_last_line(0), m_last_count(0), m_default_set(false), 64 m_target_wp(target_sp), 65 m_debugger_wp(target_sp->GetDebugger().shared_from_this()) {} 66 67 SourceManager::SourceManager(const DebuggerSP &debugger_sp) 68 : m_last_line(0), m_last_count(0), m_default_set(false), m_target_wp(), 69 m_debugger_wp(debugger_sp) {} 70 71 // Destructor 72 SourceManager::~SourceManager() = default; 73 74 SourceManager::FileSP SourceManager::GetFile(const FileSpec &file_spec) { 75 if (!file_spec) 76 return nullptr; 77 78 FileSpec resolved_fspec = file_spec; 79 resolve_tilde(resolved_fspec); 80 81 DebuggerSP debugger_sp(m_debugger_wp.lock()); 82 FileSP file_sp; 83 if (debugger_sp && debugger_sp->GetUseSourceCache()) 84 file_sp = debugger_sp->GetSourceFileCache().FindSourceFile(resolved_fspec); 85 86 TargetSP target_sp(m_target_wp.lock()); 87 88 // It the target source path map has been updated, get this file again so we 89 // can successfully remap the source file 90 if (target_sp && file_sp && 91 file_sp->GetSourceMapModificationID() != 92 target_sp->GetSourcePathMap().GetModificationID()) 93 file_sp.reset(); 94 95 // Update the file contents if needed if we found a file 96 if (file_sp) 97 file_sp->UpdateIfNeeded(); 98 99 // If file_sp is no good or it points to a non-existent file, reset it. 100 if (!file_sp || !FileSystem::Instance().Exists(file_sp->GetFileSpec())) { 101 if (target_sp) 102 file_sp = std::make_shared<File>(resolved_fspec, target_sp.get()); 103 else 104 file_sp = std::make_shared<File>(resolved_fspec, debugger_sp); 105 106 if (debugger_sp && debugger_sp->GetUseSourceCache()) 107 debugger_sp->GetSourceFileCache().AddSourceFile(file_sp); 108 } 109 return file_sp; 110 } 111 112 static bool should_highlight_source(DebuggerSP debugger_sp) { 113 if (!debugger_sp) 114 return false; 115 116 // We don't use ANSI stop column formatting if the debugger doesn't think it 117 // should be using color. 118 if (!debugger_sp->GetUseColor()) 119 return false; 120 121 return debugger_sp->GetHighlightSource(); 122 } 123 124 static bool should_show_stop_column_with_ansi(DebuggerSP debugger_sp) { 125 // We don't use ANSI stop column formatting if we can't lookup values from 126 // the debugger. 127 if (!debugger_sp) 128 return false; 129 130 // We don't use ANSI stop column formatting if the debugger doesn't think it 131 // should be using color. 132 if (!debugger_sp->GetUseColor()) 133 return false; 134 135 // We only use ANSI stop column formatting if we're either supposed to show 136 // ANSI where available (which we know we have when we get to this point), or 137 // if we're only supposed to use ANSI. 138 const auto value = debugger_sp->GetStopShowColumn(); 139 return ((value == eStopShowColumnAnsiOrCaret) || 140 (value == eStopShowColumnAnsi)); 141 } 142 143 static bool should_show_stop_column_with_caret(DebuggerSP debugger_sp) { 144 // We don't use text-based stop column formatting if we can't lookup values 145 // from the debugger. 146 if (!debugger_sp) 147 return false; 148 149 // If we're asked to show the first available of ANSI or caret, then we do 150 // show the caret when ANSI is not available. 151 const auto value = debugger_sp->GetStopShowColumn(); 152 if ((value == eStopShowColumnAnsiOrCaret) && !debugger_sp->GetUseColor()) 153 return true; 154 155 // The only other time we use caret is if we're explicitly asked to show 156 // caret. 157 return value == eStopShowColumnCaret; 158 } 159 160 static bool should_show_stop_line_with_ansi(DebuggerSP debugger_sp) { 161 return debugger_sp && debugger_sp->GetUseColor(); 162 } 163 164 size_t SourceManager::DisplaySourceLinesWithLineNumbersUsingLastFile( 165 uint32_t start_line, uint32_t count, uint32_t curr_line, uint32_t column, 166 const char *current_line_cstr, Stream *s, 167 const SymbolContextList *bp_locs) { 168 if (count == 0) 169 return 0; 170 171 Stream::ByteDelta delta(*s); 172 173 if (start_line == 0) { 174 if (m_last_line != 0 && m_last_line != UINT32_MAX) 175 start_line = m_last_line + m_last_count; 176 else 177 start_line = 1; 178 } 179 180 if (!m_default_set) { 181 FileSpec tmp_spec; 182 uint32_t tmp_line; 183 GetDefaultFileAndLine(tmp_spec, tmp_line); 184 } 185 186 m_last_line = start_line; 187 m_last_count = count; 188 189 if (FileSP last_file_sp = GetLastFile()) { 190 const uint32_t end_line = start_line + count - 1; 191 for (uint32_t line = start_line; line <= end_line; ++line) { 192 if (!last_file_sp->LineIsValid(line)) { 193 m_last_line = UINT32_MAX; 194 break; 195 } 196 197 std::string prefix; 198 if (bp_locs) { 199 uint32_t bp_count = bp_locs->NumLineEntriesWithLine(line); 200 201 if (bp_count > 0) 202 prefix = llvm::formatv("[{0}]", bp_count); 203 else 204 prefix = " "; 205 } 206 207 char buffer[3]; 208 sprintf(buffer, "%2.2s", (line == curr_line) ? current_line_cstr : ""); 209 std::string current_line_highlight(buffer); 210 211 auto debugger_sp = m_debugger_wp.lock(); 212 if (should_show_stop_line_with_ansi(debugger_sp)) { 213 current_line_highlight = ansi::FormatAnsiTerminalCodes( 214 (debugger_sp->GetStopShowLineMarkerAnsiPrefix() + 215 current_line_highlight + 216 debugger_sp->GetStopShowLineMarkerAnsiSuffix()) 217 .str()); 218 } 219 220 s->Printf("%s%s %-4u\t", prefix.c_str(), current_line_highlight.c_str(), 221 line); 222 223 // So far we treated column 0 as a special 'no column value', but 224 // DisplaySourceLines starts counting columns from 0 (and no column is 225 // expressed by passing an empty optional). 226 std::optional<size_t> columnToHighlight; 227 if (line == curr_line && column) 228 columnToHighlight = column - 1; 229 230 size_t this_line_size = 231 last_file_sp->DisplaySourceLines(line, columnToHighlight, 0, 0, s); 232 if (column != 0 && line == curr_line && 233 should_show_stop_column_with_caret(debugger_sp)) { 234 // Display caret cursor. 235 std::string src_line; 236 last_file_sp->GetLine(line, src_line); 237 s->Printf(" \t"); 238 // Insert a space for every non-tab character in the source line. 239 for (size_t i = 0; i + 1 < column && i < src_line.length(); ++i) 240 s->PutChar(src_line[i] == '\t' ? '\t' : ' '); 241 // Now add the caret. 242 s->Printf("^\n"); 243 } 244 if (this_line_size == 0) { 245 m_last_line = UINT32_MAX; 246 break; 247 } 248 } 249 } 250 return *delta; 251 } 252 253 size_t SourceManager::DisplaySourceLinesWithLineNumbers( 254 const FileSpec &file_spec, uint32_t line, uint32_t column, 255 uint32_t context_before, uint32_t context_after, 256 const char *current_line_cstr, Stream *s, 257 const SymbolContextList *bp_locs) { 258 FileSP file_sp(GetFile(file_spec)); 259 260 uint32_t start_line; 261 uint32_t count = context_before + context_after + 1; 262 if (line > context_before) 263 start_line = line - context_before; 264 else 265 start_line = 1; 266 267 FileSP last_file_sp(GetLastFile()); 268 if (last_file_sp.get() != file_sp.get()) { 269 if (line == 0) 270 m_last_line = 0; 271 m_last_file_spec = file_spec; 272 } 273 return DisplaySourceLinesWithLineNumbersUsingLastFile( 274 start_line, count, line, column, current_line_cstr, s, bp_locs); 275 } 276 277 size_t SourceManager::DisplayMoreWithLineNumbers( 278 Stream *s, uint32_t count, bool reverse, const SymbolContextList *bp_locs) { 279 // If we get called before anybody has set a default file and line, then try 280 // to figure it out here. 281 FileSP last_file_sp(GetLastFile()); 282 const bool have_default_file_line = last_file_sp && m_last_line > 0; 283 if (!m_default_set) { 284 FileSpec tmp_spec; 285 uint32_t tmp_line; 286 GetDefaultFileAndLine(tmp_spec, tmp_line); 287 } 288 289 if (last_file_sp) { 290 if (m_last_line == UINT32_MAX) 291 return 0; 292 293 if (reverse && m_last_line == 1) 294 return 0; 295 296 if (count > 0) 297 m_last_count = count; 298 else if (m_last_count == 0) 299 m_last_count = 10; 300 301 if (m_last_line > 0) { 302 if (reverse) { 303 // If this is the first time we've done a reverse, then back up one 304 // more time so we end up showing the chunk before the last one we've 305 // shown: 306 if (m_last_line > m_last_count) 307 m_last_line -= m_last_count; 308 else 309 m_last_line = 1; 310 } else if (have_default_file_line) 311 m_last_line += m_last_count; 312 } else 313 m_last_line = 1; 314 315 const uint32_t column = 0; 316 return DisplaySourceLinesWithLineNumbersUsingLastFile( 317 m_last_line, m_last_count, UINT32_MAX, column, "", s, bp_locs); 318 } 319 return 0; 320 } 321 322 bool SourceManager::SetDefaultFileAndLine(const FileSpec &file_spec, 323 uint32_t line) { 324 m_default_set = true; 325 FileSP file_sp(GetFile(file_spec)); 326 327 if (file_sp) { 328 m_last_line = line; 329 m_last_file_spec = file_spec; 330 return true; 331 } else { 332 return false; 333 } 334 } 335 336 bool SourceManager::GetDefaultFileAndLine(FileSpec &file_spec, uint32_t &line) { 337 if (FileSP last_file_sp = GetLastFile()) { 338 file_spec = m_last_file_spec; 339 line = m_last_line; 340 return true; 341 } else if (!m_default_set) { 342 TargetSP target_sp(m_target_wp.lock()); 343 344 if (target_sp) { 345 // If nobody has set the default file and line then try here. If there's 346 // no executable, then we will try again later when there is one. 347 // Otherwise, if we can't find it we won't look again, somebody will have 348 // to set it (for instance when we stop somewhere...) 349 Module *executable_ptr = target_sp->GetExecutableModulePointer(); 350 if (executable_ptr) { 351 SymbolContextList sc_list; 352 ConstString main_name("main"); 353 354 ModuleFunctionSearchOptions function_options; 355 function_options.include_symbols = 356 false; // Force it to be a debug symbol. 357 function_options.include_inlines = true; 358 executable_ptr->FindFunctions(main_name, CompilerDeclContext(), 359 lldb::eFunctionNameTypeBase, 360 function_options, sc_list); 361 size_t num_matches = sc_list.GetSize(); 362 for (size_t idx = 0; idx < num_matches; idx++) { 363 SymbolContext sc; 364 sc_list.GetContextAtIndex(idx, sc); 365 if (sc.function) { 366 lldb_private::LineEntry line_entry; 367 if (sc.function->GetAddressRange() 368 .GetBaseAddress() 369 .CalculateSymbolContextLineEntry(line_entry)) { 370 SetDefaultFileAndLine(line_entry.file, line_entry.line); 371 file_spec = m_last_file_spec; 372 line = m_last_line; 373 return true; 374 } 375 } 376 } 377 } 378 } 379 } 380 return false; 381 } 382 383 void SourceManager::FindLinesMatchingRegex(FileSpec &file_spec, 384 RegularExpression ®ex, 385 uint32_t start_line, 386 uint32_t end_line, 387 std::vector<uint32_t> &match_lines) { 388 match_lines.clear(); 389 FileSP file_sp = GetFile(file_spec); 390 if (!file_sp) 391 return; 392 return file_sp->FindLinesMatchingRegex(regex, start_line, end_line, 393 match_lines); 394 } 395 396 SourceManager::File::File(const FileSpec &file_spec, 397 lldb::DebuggerSP debugger_sp) 398 : m_file_spec_orig(file_spec), m_file_spec(file_spec), 399 m_mod_time(FileSystem::Instance().GetModificationTime(file_spec)), 400 m_debugger_wp(debugger_sp) { 401 CommonInitializer(file_spec, nullptr); 402 } 403 404 SourceManager::File::File(const FileSpec &file_spec, Target *target) 405 : m_file_spec_orig(file_spec), m_file_spec(file_spec), 406 m_mod_time(FileSystem::Instance().GetModificationTime(file_spec)), 407 m_debugger_wp(target ? target->GetDebugger().shared_from_this() 408 : DebuggerSP()) { 409 CommonInitializer(file_spec, target); 410 } 411 412 void SourceManager::File::CommonInitializer(const FileSpec &file_spec, 413 Target *target) { 414 if (m_mod_time == llvm::sys::TimePoint<>()) { 415 if (target) { 416 m_source_map_mod_id = target->GetSourcePathMap().GetModificationID(); 417 418 if (!file_spec.GetDirectory() && file_spec.GetFilename()) { 419 // If this is just a file name, lets see if we can find it in the 420 // target: 421 bool check_inlines = false; 422 SymbolContextList sc_list; 423 size_t num_matches = 424 target->GetImages().ResolveSymbolContextForFilePath( 425 file_spec.GetFilename().AsCString(), 0, check_inlines, 426 SymbolContextItem(eSymbolContextModule | 427 eSymbolContextCompUnit), 428 sc_list); 429 bool got_multiple = false; 430 if (num_matches != 0) { 431 if (num_matches > 1) { 432 SymbolContext sc; 433 CompileUnit *test_cu = nullptr; 434 435 for (unsigned i = 0; i < num_matches; i++) { 436 sc_list.GetContextAtIndex(i, sc); 437 if (sc.comp_unit) { 438 if (test_cu) { 439 if (test_cu != sc.comp_unit) 440 got_multiple = true; 441 break; 442 } else 443 test_cu = sc.comp_unit; 444 } 445 } 446 } 447 if (!got_multiple) { 448 SymbolContext sc; 449 sc_list.GetContextAtIndex(0, sc); 450 if (sc.comp_unit) 451 m_file_spec = sc.comp_unit->GetPrimaryFile(); 452 m_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec); 453 } 454 } 455 } 456 resolve_tilde(m_file_spec); 457 // Try remapping if m_file_spec does not correspond to an existing file. 458 if (!FileSystem::Instance().Exists(m_file_spec)) { 459 // Check target specific source remappings (i.e., the 460 // target.source-map setting), then fall back to the module 461 // specific remapping (i.e., the .dSYM remapping dictionary). 462 auto remapped = target->GetSourcePathMap().FindFile(m_file_spec); 463 if (!remapped) { 464 FileSpec new_spec; 465 if (target->GetImages().FindSourceFile(m_file_spec, new_spec)) 466 remapped = new_spec; 467 } 468 if (remapped) { 469 m_file_spec = *remapped; 470 m_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec); 471 } 472 } 473 } 474 } 475 476 if (m_mod_time != llvm::sys::TimePoint<>()) 477 m_data_sp = FileSystem::Instance().CreateDataBuffer(m_file_spec); 478 } 479 480 uint32_t SourceManager::File::GetLineOffset(uint32_t line) { 481 if (line == 0) 482 return UINT32_MAX; 483 484 if (line == 1) 485 return 0; 486 487 if (CalculateLineOffsets(line)) { 488 if (line < m_offsets.size()) 489 return m_offsets[line - 1]; // yes we want "line - 1" in the index 490 } 491 return UINT32_MAX; 492 } 493 494 uint32_t SourceManager::File::GetNumLines() { 495 CalculateLineOffsets(); 496 return m_offsets.size(); 497 } 498 499 const char *SourceManager::File::PeekLineData(uint32_t line) { 500 if (!LineIsValid(line)) 501 return nullptr; 502 503 size_t line_offset = GetLineOffset(line); 504 if (line_offset < m_data_sp->GetByteSize()) 505 return (const char *)m_data_sp->GetBytes() + line_offset; 506 return nullptr; 507 } 508 509 uint32_t SourceManager::File::GetLineLength(uint32_t line, 510 bool include_newline_chars) { 511 if (!LineIsValid(line)) 512 return false; 513 514 size_t start_offset = GetLineOffset(line); 515 size_t end_offset = GetLineOffset(line + 1); 516 if (end_offset == UINT32_MAX) 517 end_offset = m_data_sp->GetByteSize(); 518 519 if (end_offset > start_offset) { 520 uint32_t length = end_offset - start_offset; 521 if (!include_newline_chars) { 522 const char *line_start = 523 (const char *)m_data_sp->GetBytes() + start_offset; 524 while (length > 0) { 525 const char last_char = line_start[length - 1]; 526 if ((last_char == '\r') || (last_char == '\n')) 527 --length; 528 else 529 break; 530 } 531 } 532 return length; 533 } 534 return 0; 535 } 536 537 bool SourceManager::File::LineIsValid(uint32_t line) { 538 if (line == 0) 539 return false; 540 541 if (CalculateLineOffsets(line)) 542 return line < m_offsets.size(); 543 return false; 544 } 545 546 void SourceManager::File::UpdateIfNeeded() { 547 // TODO: use host API to sign up for file modifications to anything in our 548 // source cache and only update when we determine a file has been updated. 549 // For now we check each time we want to display info for the file. 550 auto curr_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec); 551 552 if (curr_mod_time != llvm::sys::TimePoint<>() && 553 m_mod_time != curr_mod_time) { 554 m_mod_time = curr_mod_time; 555 m_data_sp = FileSystem::Instance().CreateDataBuffer(m_file_spec); 556 m_offsets.clear(); 557 } 558 } 559 560 size_t SourceManager::File::DisplaySourceLines(uint32_t line, 561 std::optional<size_t> column, 562 uint32_t context_before, 563 uint32_t context_after, 564 Stream *s) { 565 // Nothing to write if there's no stream. 566 if (!s) 567 return 0; 568 569 // Sanity check m_data_sp before proceeding. 570 if (!m_data_sp) 571 return 0; 572 573 size_t bytes_written = s->GetWrittenBytes(); 574 575 auto debugger_sp = m_debugger_wp.lock(); 576 577 HighlightStyle style; 578 // Use the default Vim style if source highlighting is enabled. 579 if (should_highlight_source(debugger_sp)) 580 style = HighlightStyle::MakeVimStyle(); 581 582 // If we should mark the stop column with color codes, then copy the prefix 583 // and suffix to our color style. 584 if (should_show_stop_column_with_ansi(debugger_sp)) 585 style.selected.Set(debugger_sp->GetStopShowColumnAnsiPrefix(), 586 debugger_sp->GetStopShowColumnAnsiSuffix()); 587 588 HighlighterManager mgr; 589 std::string path = GetFileSpec().GetPath(/*denormalize*/ false); 590 // FIXME: Find a way to get the definitive language this file was written in 591 // and pass it to the highlighter. 592 const auto &h = mgr.getHighlighterFor(lldb::eLanguageTypeUnknown, path); 593 594 const uint32_t start_line = 595 line <= context_before ? 1 : line - context_before; 596 const uint32_t start_line_offset = GetLineOffset(start_line); 597 if (start_line_offset != UINT32_MAX) { 598 const uint32_t end_line = line + context_after; 599 uint32_t end_line_offset = GetLineOffset(end_line + 1); 600 if (end_line_offset == UINT32_MAX) 601 end_line_offset = m_data_sp->GetByteSize(); 602 603 assert(start_line_offset <= end_line_offset); 604 if (start_line_offset < end_line_offset) { 605 size_t count = end_line_offset - start_line_offset; 606 const uint8_t *cstr = m_data_sp->GetBytes() + start_line_offset; 607 608 auto ref = llvm::StringRef(reinterpret_cast<const char *>(cstr), count); 609 610 h.Highlight(style, ref, column, "", *s); 611 612 // Ensure we get an end of line character one way or another. 613 if (!is_newline_char(ref.back())) 614 s->EOL(); 615 } 616 } 617 return s->GetWrittenBytes() - bytes_written; 618 } 619 620 void SourceManager::File::FindLinesMatchingRegex( 621 RegularExpression ®ex, uint32_t start_line, uint32_t end_line, 622 std::vector<uint32_t> &match_lines) { 623 match_lines.clear(); 624 625 if (!LineIsValid(start_line) || 626 (end_line != UINT32_MAX && !LineIsValid(end_line))) 627 return; 628 if (start_line > end_line) 629 return; 630 631 for (uint32_t line_no = start_line; line_no < end_line; line_no++) { 632 std::string buffer; 633 if (!GetLine(line_no, buffer)) 634 break; 635 if (regex.Execute(buffer)) { 636 match_lines.push_back(line_no); 637 } 638 } 639 } 640 641 bool lldb_private::operator==(const SourceManager::File &lhs, 642 const SourceManager::File &rhs) { 643 if (lhs.m_file_spec != rhs.m_file_spec) 644 return false; 645 return lhs.m_mod_time == rhs.m_mod_time; 646 } 647 648 bool SourceManager::File::CalculateLineOffsets(uint32_t line) { 649 line = 650 UINT32_MAX; // TODO: take this line out when we support partial indexing 651 if (line == UINT32_MAX) { 652 // Already done? 653 if (!m_offsets.empty() && m_offsets[0] == UINT32_MAX) 654 return true; 655 656 if (m_offsets.empty()) { 657 if (m_data_sp.get() == nullptr) 658 return false; 659 660 const char *start = (const char *)m_data_sp->GetBytes(); 661 if (start) { 662 const char *end = start + m_data_sp->GetByteSize(); 663 664 // Calculate all line offsets from scratch 665 666 // Push a 1 at index zero to indicate the file has been completely 667 // indexed. 668 m_offsets.push_back(UINT32_MAX); 669 const char *s; 670 for (s = start; s < end; ++s) { 671 char curr_ch = *s; 672 if (is_newline_char(curr_ch)) { 673 if (s + 1 < end) { 674 char next_ch = s[1]; 675 if (is_newline_char(next_ch)) { 676 if (curr_ch != next_ch) 677 ++s; 678 } 679 } 680 m_offsets.push_back(s + 1 - start); 681 } 682 } 683 if (!m_offsets.empty()) { 684 if (m_offsets.back() < size_t(end - start)) 685 m_offsets.push_back(end - start); 686 } 687 return true; 688 } 689 } else { 690 // Some lines have been populated, start where we last left off 691 assert("Not implemented yet" && false); 692 } 693 694 } else { 695 // Calculate all line offsets up to "line" 696 assert("Not implemented yet" && false); 697 } 698 return false; 699 } 700 701 bool SourceManager::File::GetLine(uint32_t line_no, std::string &buffer) { 702 if (!LineIsValid(line_no)) 703 return false; 704 705 size_t start_offset = GetLineOffset(line_no); 706 size_t end_offset = GetLineOffset(line_no + 1); 707 if (end_offset == UINT32_MAX) { 708 end_offset = m_data_sp->GetByteSize(); 709 } 710 buffer.assign((const char *)m_data_sp->GetBytes() + start_offset, 711 end_offset - start_offset); 712 713 return true; 714 } 715 716 void SourceManager::SourceFileCache::AddSourceFile(const FileSP &file_sp) { 717 FileSpec file_spec = file_sp->GetFileSpec(); 718 FileCache::iterator pos = m_file_cache.find(file_spec); 719 if (pos == m_file_cache.end()) 720 m_file_cache[file_spec] = file_sp; 721 else { 722 if (file_sp != pos->second) 723 m_file_cache[file_spec] = file_sp; 724 } 725 } 726 727 SourceManager::FileSP SourceManager::SourceFileCache::FindSourceFile( 728 const FileSpec &file_spec) const { 729 FileSP file_sp; 730 FileCache::const_iterator pos = m_file_cache.find(file_spec); 731 if (pos != m_file_cache.end()) 732 file_sp = pos->second; 733 return file_sp; 734 } 735