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