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 <utility>
36
37#include <cassert>
38#include <cstdio>
39
40namespace lldb_private {
41class ExecutionContext;
42}
43namespace lldb_private {
44class ValueObject;
45}
46
47using namespace lldb;
48using namespace lldb_private;
49
50static inline bool is_newline_char(char ch) { return ch == '\n' || ch == '\r'; }
51
52static void resolve_tilde(FileSpec &file_spec) {
53 if (!FileSystem::Instance().Exists(file_spec) &&
54 file_spec.GetDirectory() &&
55 file_spec.GetDirectory().GetCString()[0] == '~') {
56 FileSystem::Instance().Resolve(file_spec);
57 }
58}
59
60// SourceManager constructor
61SourceManager::SourceManager(const TargetSP &target_sp)
62 : m_last_line(0), m_last_count(0), m_default_set(false),
63 m_target_wp(target_sp),
64 m_debugger_wp(target_sp->GetDebugger().shared_from_this()) {}
65
66SourceManager::SourceManager(const DebuggerSP &debugger_sp)
67 : m_last_line(0), m_last_count(0), m_default_set(false), m_target_wp(),
68 m_debugger_wp(debugger_sp) {}
69
70// Destructor
71SourceManager::~SourceManager() = default;
72
73SourceManager::FileSP SourceManager::GetFile(const FileSpec &file_spec) {
74 if (!file_spec)
75 return nullptr;
76
77 FileSpec resolved_fspec = file_spec;
78 resolve_tilde(resolved_fspec);
79
80 DebuggerSP debugger_sp(m_debugger_wp.lock());
81 FileSP file_sp;
82 if (debugger_sp && debugger_sp->GetUseSourceCache())
83 file_sp = debugger_sp->GetSourceFileCache().FindSourceFile(resolved_fspec);
84
85 TargetSP target_sp(m_target_wp.lock());
86
87 // It the target source path map has been updated, get this file again so we
88 // can successfully remap the source file
89 if (target_sp && file_sp &&
90 file_sp->GetSourceMapModificationID() !=
91 target_sp->GetSourcePathMap().GetModificationID())
92 file_sp.reset();
93
94 // Update the file contents if needed if we found a file
95 if (file_sp)
96 file_sp->UpdateIfNeeded();
97
98 // If file_sp is no good or it points to a non-existent file, reset it.
99 if (!file_sp || !FileSystem::Instance().Exists(file_sp->GetFileSpec())) {
100 if (target_sp)
101 file_sp = std::make_shared<File>(resolved_fspec, target_sp.get());
102 else
103 file_sp = std::make_shared<File>(resolved_fspec, debugger_sp);
104
105 if (debugger_sp && debugger_sp->GetUseSourceCache())
106 debugger_sp->GetSourceFileCache().AddSourceFile(file_sp);
107 }
108 return file_sp;
109}
110
111static bool should_highlight_source(DebuggerSP debugger_sp) {
112 if (!debugger_sp)
113 return false;
114
115 // We don't use ANSI stop column formatting if the debugger doesn't think it
116 // should be using color.
117 if (!debugger_sp->GetUseColor())
118 return false;
119
120 return debugger_sp->GetHighlightSource();
121}
122
123static bool should_show_stop_column_with_ansi(DebuggerSP debugger_sp) {
124 // We don't use ANSI stop column formatting if we can't lookup values from
125 // the debugger.
126 if (!debugger_sp)
127 return false;
128
129 // We don't use ANSI stop column formatting if the debugger doesn't think it
130 // should be using color.
131 if (!debugger_sp->GetUseColor())
132 return false;
133
134 // We only use ANSI stop column formatting if we're either supposed to show
135 // ANSI where available (which we know we have when we get to this point), or
136 // if we're only supposed to use ANSI.
137 const auto value = debugger_sp->GetStopShowColumn();
138 return ((value == eStopShowColumnAnsiOrCaret) ||
139 (value == eStopShowColumnAnsi));
140}
141
142static bool should_show_stop_column_with_caret(DebuggerSP debugger_sp) {
143 // We don't use text-based stop column formatting if we can't lookup values
144 // from the debugger.
145 if (!debugger_sp)
146 return false;
147
148 // If we're asked to show the first available of ANSI or caret, then we do
149 // show the caret when ANSI is not available.
150 const auto value = debugger_sp->GetStopShowColumn();
151 if ((value == eStopShowColumnAnsiOrCaret) && !debugger_sp->GetUseColor())
152 return true;
153
154 // The only other time we use caret is if we're explicitly asked to show
155 // caret.
156 return value == eStopShowColumnCaret;
157}
158
159static bool should_show_stop_line_with_ansi(DebuggerSP debugger_sp) {
160 return debugger_sp && debugger_sp->GetUseColor();
161}
162
163size_t SourceManager::DisplaySourceLinesWithLineNumbersUsingLastFile(
164 uint32_t start_line, uint32_t count, uint32_t curr_line, uint32_t column,
165 const char *current_line_cstr, Stream *s,
166 const SymbolContextList *bp_locs) {
167 if (count == 0)
168 return 0;
169
170 Stream::ByteDelta delta(*s);
171
172 if (start_line == 0) {
173 if (m_last_line != 0 && m_last_line != UINT32_MAX)
174 start_line = m_last_line + m_last_count;
175 else
176 start_line = 1;
177 }
178
179 if (!m_default_set) {
180 FileSpec tmp_spec;
181 uint32_t tmp_line;
182 GetDefaultFileAndLine(tmp_spec, tmp_line);
183 }
184
185 m_last_line = start_line;
186 m_last_count = count;
187
188 if (FileSP last_file_sp = GetLastFile()) {
189 const uint32_t end_line = start_line + count - 1;
190 for (uint32_t line = start_line; line <= end_line; ++line) {
191 if (!last_file_sp->LineIsValid(line)) {
192 m_last_line = UINT32_MAX;
193 break;
194 }
195
196 std::string prefix;
197 if (bp_locs) {
198 uint32_t bp_count = bp_locs->NumLineEntriesWithLine(line);
199
200 if (bp_count > 0)
201 prefix = llvm::formatv("[{0}]", bp_count);
202 else
203 prefix = " ";
204 }
205
206 char buffer[3];
207 sprintf(buffer, "%2.2s", (line == curr_line) ? current_line_cstr : "");
208 std::string current_line_highlight(buffer);
209
210 auto debugger_sp = m_debugger_wp.lock();
211 if (should_show_stop_line_with_ansi(debugger_sp)) {
212 current_line_highlight = ansi::FormatAnsiTerminalCodes(
213 (debugger_sp->GetStopShowLineMarkerAnsiPrefix() +
214 current_line_highlight +
215 debugger_sp->GetStopShowLineMarkerAnsiSuffix())
216 .str());
217 }
218
219 s->Printf("%s%s %-4u\t", prefix.c_str(), current_line_highlight.c_str(),
220 line);
221
222 // So far we treated column 0 as a special 'no column value', but
223 // DisplaySourceLines starts counting columns from 0 (and no column is
224 // expressed by passing an empty optional).
225 llvm::Optional<size_t> columnToHighlight;
226 if (line == curr_line && column)
227 columnToHighlight = column - 1;
228
229 size_t this_line_size =
230 last_file_sp->DisplaySourceLines(line, columnToHighlight, 0, 0, s);
231 if (column != 0 && line == curr_line &&
232 should_show_stop_column_with_caret(debugger_sp)) {
233 // Display caret cursor.
234 std::string src_line;
235 last_file_sp->GetLine(line, src_line);
236 s->Printf(" \t");
237 // Insert a space for every non-tab character in the source line.
238 for (size_t i = 0; i + 1 < column && i < src_line.length(); ++i)
239 s->PutChar(src_line[i] == '\t' ? '\t' : ' ');
240 // Now add the caret.
241 s->Printf("^\n");
242 }
243 if (this_line_size == 0) {
244 m_last_line = UINT32_MAX;
245 break;
246 }
247 }
248 }
249 return *delta;
250}
251
252size_t SourceManager::DisplaySourceLinesWithLineNumbers(
253 const FileSpec &file_spec, uint32_t line, uint32_t column,
254 uint32_t context_before, uint32_t context_after,
255 const char *current_line_cstr, Stream *s,
256 const SymbolContextList *bp_locs) {
257 FileSP file_sp(GetFile(file_spec));
258
259 uint32_t start_line;
260 uint32_t count = context_before + context_after + 1;
261 if (line > context_before)
262 start_line = line - context_before;
263 else
264 start_line = 1;
265
266 FileSP last_file_sp(GetLastFile());
267 if (last_file_sp.get() != file_sp.get()) {
268 if (line == 0)
269 m_last_line = 0;
270 m_last_file_spec = file_spec;
271 }
272 return DisplaySourceLinesWithLineNumbersUsingLastFile(
273 start_line, count, line, column, current_line_cstr, s, bp_locs);
274}
275
276size_t SourceManager::DisplayMoreWithLineNumbers(
277 Stream *s, uint32_t count, bool reverse, const SymbolContextList *bp_locs) {
278 // If we get called before anybody has set a default file and line, then try
279 // to figure it out here.
280 FileSP last_file_sp(GetLastFile());
281 const bool have_default_file_line = last_file_sp && m_last_line > 0;
282 if (!m_default_set) {
283 FileSpec tmp_spec;
284 uint32_t tmp_line;
285 GetDefaultFileAndLine(tmp_spec, tmp_line);
286 }
287
288 if (last_file_sp) {
289 if (m_last_line == UINT32_MAX)
290 return 0;
291
292 if (reverse && m_last_line == 1)
293 return 0;
294
295 if (count > 0)
296 m_last_count = count;
297 else if (m_last_count == 0)
298 m_last_count = 10;
299
300 if (m_last_line > 0) {
301 if (reverse) {
302 // If this is the first time we've done a reverse, then back up one
303 // more time so we end up showing the chunk before the last one we've
304 // shown:
305 if (m_last_line > m_last_count)
306 m_last_line -= m_last_count;
307 else
308 m_last_line = 1;
309 } else if (have_default_file_line)
310 m_last_line += m_last_count;
311 } else
312 m_last_line = 1;
313
314 const uint32_t column = 0;
315 return DisplaySourceLinesWithLineNumbersUsingLastFile(
316 m_last_line, m_last_count, UINT32_MAX, column, "", s, bp_locs);
317 }
318 return 0;
319}
320
321bool SourceManager::SetDefaultFileAndLine(const FileSpec &file_spec,
322 uint32_t line) {
323 m_default_set = true;
324 FileSP file_sp(GetFile(file_spec));
325
326 if (file_sp) {
327 m_last_line = line;
328 m_last_file_spec = file_spec;
329 return true;
330 } else {
331 return false;
332 }
333}
334
335bool SourceManager::GetDefaultFileAndLine(FileSpec &file_spec, uint32_t &line) {
336 if (FileSP last_file_sp = GetLastFile()) {
337 file_spec = m_last_file_spec;
338 line = m_last_line;
339 return true;
340 } else if (!m_default_set) {
341 TargetSP target_sp(m_target_wp.lock());
342
343 if (target_sp) {
344 // If nobody has set the default file and line then try here. If there's
345 // no executable, then we will try again later when there is one.
346 // Otherwise, if we can't find it we won't look again, somebody will have
347 // to set it (for instance when we stop somewhere...)
348 Module *executable_ptr = target_sp->GetExecutableModulePointer();
349 if (executable_ptr) {
350 SymbolContextList sc_list;
351 ConstString main_name("main");
352
353 ModuleFunctionSearchOptions function_options;
354 function_options.include_symbols =
355 false; // Force it to be a debug symbol.
356 function_options.include_inlines = true;
357 executable_ptr->FindFunctions(main_name, CompilerDeclContext(),
358 lldb::eFunctionNameTypeBase,
359 function_options, sc_list);
360 size_t num_matches = sc_list.GetSize();
361 for (size_t idx = 0; idx < num_matches; idx++) {
362 SymbolContext sc;
363 sc_list.GetContextAtIndex(idx, sc);
364 if (sc.function) {
365 lldb_private::LineEntry line_entry;
366 if (sc.function->GetAddressRange()
367 .GetBaseAddress()
368 .CalculateSymbolContextLineEntry(line_entry)) {
369 SetDefaultFileAndLine(line_entry.file, line_entry.line);
370 file_spec = m_last_file_spec;
371 line = m_last_line;
372 return true;
373 }
374 }
375 }
376 }
377 }
378 }
379 return false;
380}
381
382void SourceManager::FindLinesMatchingRegex(FileSpec &file_spec,
383 RegularExpression &regex,
384 uint32_t start_line,
385 uint32_t end_line,
386 std::vector<uint32_t> &match_lines) {
387 match_lines.clear();
388 FileSP file_sp = GetFile(file_spec);
389 if (!file_sp)
390 return;
391 return file_sp->FindLinesMatchingRegex(regex, start_line, end_line,
392 match_lines);
393}
394
395SourceManager::File::File(const FileSpec &file_spec,
396 lldb::DebuggerSP debugger_sp)
397 : m_file_spec_orig(file_spec), m_file_spec(file_spec),
398 m_mod_time(FileSystem::Instance().GetModificationTime(file_spec)),
399 m_debugger_wp(debugger_sp) {
400 CommonInitializer(file_spec, nullptr);
401}
402
403SourceManager::File::File(const FileSpec &file_spec, Target *target)
404 : m_file_spec_orig(file_spec), m_file_spec(file_spec),
405 m_mod_time(FileSystem::Instance().GetModificationTime(file_spec)),
406 m_debugger_wp(target ? target->GetDebugger().shared_from_this()
407 : DebuggerSP()) {
408 CommonInitializer(file_spec, target);
409}
410
411void SourceManager::File::CommonInitializer(const FileSpec &file_spec,
412 Target *target) {
413 if (m_mod_time == llvm::sys::TimePoint<>()) {
414 if (target) {
415 m_source_map_mod_id = target->GetSourcePathMap().GetModificationID();
416
417 if (!file_spec.GetDirectory() && file_spec.GetFilename()) {
418 // If this is just a file name, lets see if we can find it in the
419 // target:
420 bool check_inlines = false;
421 SymbolContextList sc_list;
422 size_t num_matches =
423 target->GetImages().ResolveSymbolContextForFilePath(
424 file_spec.GetFilename().AsCString(), 0, check_inlines,
425 SymbolContextItem(eSymbolContextModule |
426 eSymbolContextCompUnit),
427 sc_list);
428 bool got_multiple = false;
429 if (num_matches != 0) {
430 if (num_matches > 1) {
431 SymbolContext sc;
432 CompileUnit *test_cu = nullptr;
433
434 for (unsigned i = 0; i < num_matches; i++) {
435 sc_list.GetContextAtIndex(i, sc);
436 if (sc.comp_unit) {
437 if (test_cu) {
438 if (test_cu != sc.comp_unit)
439 got_multiple = true;
440 break;
441 } else
442 test_cu = sc.comp_unit;
443 }
444 }
445 }
446 if (!got_multiple) {
447 SymbolContext sc;
448 sc_list.GetContextAtIndex(0, sc);
449 if (sc.comp_unit)
450 m_file_spec = sc.comp_unit->GetPrimaryFile();
451 m_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec);
452 }
453 }
454 }
455 resolve_tilde(m_file_spec);
456 // Try remapping if m_file_spec does not correspond to an existing file.
457 if (!FileSystem::Instance().Exists(m_file_spec)) {
458 // Check target specific source remappings (i.e., the
459 // target.source-map setting), then fall back to the module
460 // specific remapping (i.e., the .dSYM remapping dictionary).
461 auto remapped = target->GetSourcePathMap().FindFile(m_file_spec);
462 if (!remapped) {
463 FileSpec new_spec;
464 if (target->GetImages().FindSourceFile(m_file_spec, new_spec))
465 remapped = new_spec;
466 }
467 if (remapped) {
468 m_file_spec = *remapped;
469 m_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec);
470 }
471 }
472 }
473 }
474
475 if (m_mod_time != llvm::sys::TimePoint<>())
476 m_data_sp = FileSystem::Instance().CreateDataBuffer(m_file_spec);
477}
478
479uint32_t SourceManager::File::GetLineOffset(uint32_t line) {
480 if (line == 0)
481 return UINT32_MAX;
482
483 if (line == 1)
484 return 0;
485
486 if (CalculateLineOffsets(line)) {
487 if (line < m_offsets.size())
488 return m_offsets[line - 1]; // yes we want "line - 1" in the index
489 }
490 return UINT32_MAX;
491}
492
493uint32_t SourceManager::File::GetNumLines() {
494 CalculateLineOffsets();
495 return m_offsets.size();
496}
497
498const char *SourceManager::File::PeekLineData(uint32_t line) {
499 if (!LineIsValid(line))
500 return nullptr;
501
502 size_t line_offset = GetLineOffset(line);
503 if (line_offset < m_data_sp->GetByteSize())
504 return (const char *)m_data_sp->GetBytes() + line_offset;
505 return nullptr;
506}
507
508uint32_t SourceManager::File::GetLineLength(uint32_t line,
509 bool include_newline_chars) {
510 if (!LineIsValid(line))
511 return false;
512
513 size_t start_offset = GetLineOffset(line);
514 size_t end_offset = GetLineOffset(line + 1);
515 if (end_offset == UINT32_MAX)
516 end_offset = m_data_sp->GetByteSize();
517
518 if (end_offset > start_offset) {
519 uint32_t length = end_offset - start_offset;
520 if (!include_newline_chars) {
521 const char *line_start =
522 (const char *)m_data_sp->GetBytes() + start_offset;
523 while (length > 0) {
524 const char last_char = line_start[length - 1];
525 if ((last_char == '\r') || (last_char == '\n'))
526 --length;
527 else
528 break;
529 }
530 }
531 return length;
532 }
533 return 0;
534}
535
536bool SourceManager::File::LineIsValid(uint32_t line) {
537 if (line == 0)
538 return false;
539
540 if (CalculateLineOffsets(line))
541 return line < m_offsets.size();
542 return false;
543}
544
545void SourceManager::File::UpdateIfNeeded() {
546 // TODO: use host API to sign up for file modifications to anything in our
547 // source cache and only update when we determine a file has been updated.
548 // For now we check each time we want to display info for the file.
549 auto curr_mod_time = FileSystem::Instance().GetModificationTime(m_file_spec);
550
551 if (curr_mod_time != llvm::sys::TimePoint<>() &&
552 m_mod_time != curr_mod_time) {
553 m_mod_time = curr_mod_time;
554 m_data_sp = FileSystem::Instance().CreateDataBuffer(m_file_spec);
555 m_offsets.clear();
556 }
557}
558
559size_t SourceManager::File::DisplaySourceLines(uint32_t line,
560 llvm::Optional<size_t> column,
561 uint32_t context_before,
562 uint32_t context_after,
563 Stream *s) {
564 // Nothing to write if there's no stream.
565 if (!s)
566 return 0;
567
568 // Sanity check m_data_sp before proceeding.
569 if (!m_data_sp)
570 return 0;
571
572 size_t bytes_written = s->GetWrittenBytes();
573
574 auto debugger_sp = m_debugger_wp.lock();
575
576 HighlightStyle style;
577 // Use the default Vim style if source highlighting is enabled.
578 if (should_highlight_source(debugger_sp))
579 style = HighlightStyle::MakeVimStyle();
580
581 // If we should mark the stop column with color codes, then copy the prefix
582 // and suffix to our color style.
583 if (should_show_stop_column_with_ansi(debugger_sp))
584 style.selected.Set(debugger_sp->GetStopShowColumnAnsiPrefix(),
585 debugger_sp->GetStopShowColumnAnsiSuffix());
586
587 HighlighterManager mgr;
588 std::string path = GetFileSpec().GetPath(/*denormalize*/ false);
589 // FIXME: Find a way to get the definitive language this file was written in
590 // and pass it to the highlighter.
591 const auto &h = mgr.getHighlighterFor(lldb::eLanguageTypeUnknown, path);
592
593 const uint32_t start_line =
594 line <= context_before ? 1 : line - context_before;
595 const uint32_t start_line_offset = GetLineOffset(start_line);
596 if (start_line_offset != UINT32_MAX) {
597 const uint32_t end_line = line + context_after;
598 uint32_t end_line_offset = GetLineOffset(end_line + 1);
599 if (end_line_offset == UINT32_MAX)
600 end_line_offset = m_data_sp->GetByteSize();
601
602 assert(start_line_offset <= end_line_offset);
603 if (start_line_offset < end_line_offset) {
604 size_t count = end_line_offset - start_line_offset;
605 const uint8_t *cstr = m_data_sp->GetBytes() + start_line_offset;
606
607 auto ref = llvm::StringRef(reinterpret_cast<const char *>(cstr), count);
608
609 h.Highlight(style, ref, column, "", *s);
610
611 // Ensure we get an end of line character one way or another.
612 if (!is_newline_char(ref.back()))
613 s->EOL();
614 }
615 }
616 return s->GetWrittenBytes() - bytes_written;
617}
618
619void SourceManager::File::FindLinesMatchingRegex(
620 RegularExpression &regex, uint32_t start_line, uint32_t end_line,
621 std::vector<uint32_t> &match_lines) {
622 match_lines.clear();
623
624 if (!LineIsValid(start_line) ||
625 (end_line != UINT32_MAX && !LineIsValid(end_line)))
626 return;
627 if (start_line > end_line)
628 return;
629
630 for (uint32_t line_no = start_line; line_no < end_line; line_no++) {
631 std::string buffer;
632 if (!GetLine(line_no, buffer))
633 break;
634 if (regex.Execute(buffer)) {
635 match_lines.push_back(line_no);
636 }
637 }
638}
639
640bool lldb_private::operator==(const SourceManager::File &lhs,
641 const SourceManager::File &rhs) {
642 if (lhs.m_file_spec != rhs.m_file_spec)
643 return false;
644 return lhs.m_mod_time == rhs.m_mod_time;
645}
646
647bool SourceManager::File::CalculateLineOffsets(uint32_t line) {
648 line =
649 UINT32_MAX; // TODO: take this line out when we support partial indexing
650 if (line == UINT32_MAX) {
651 // Already done?
652 if (!m_offsets.empty() && m_offsets[0] == UINT32_MAX)
653 return true;
654
655 if (m_offsets.empty()) {
656 if (m_data_sp.get() == nullptr)
657 return false;
658
659 const char *start = (const char *)m_data_sp->GetBytes();
660 if (start) {
661 const char *end = start + m_data_sp->GetByteSize();
662
663 // Calculate all line offsets from scratch
664
665 // Push a 1 at index zero to indicate the file has been completely
666 // indexed.
667 m_offsets.push_back(UINT32_MAX);
668 const char *s;
669 for (s = start; s < end; ++s) {
670 char curr_ch = *s;
671 if (is_newline_char(curr_ch)) {
672 if (s + 1 < end) {
673 char next_ch = s[1];
674 if (is_newline_char(next_ch)) {
675 if (curr_ch != next_ch)
676 ++s;
677 }
678 }
679 m_offsets.push_back(s + 1 - start);
680 }
681 }
682 if (!m_offsets.empty()) {
683 if (m_offsets.back() < size_t(end - start))
684 m_offsets.push_back(end - start);
685 }
686 return true;
687 }
688 } else {
689 // Some lines have been populated, start where we last left off
690 assert("Not implemented yet" && false);
691 }
692
693 } else {
694 // Calculate all line offsets up to "line"
695 assert("Not implemented yet" && false);
696 }
697 return false;
698}
699
700bool SourceManager::File::GetLine(uint32_t line_no, std::string &buffer) {
701 if (!LineIsValid(line_no))
702 return false;
703
704 size_t start_offset = GetLineOffset(line_no);
705 size_t end_offset = GetLineOffset(line_no + 1);
706 if (end_offset == UINT32_MAX) {
707 end_offset = m_data_sp->GetByteSize();
708 }
709 buffer.assign((const char *)m_data_sp->GetBytes() + start_offset,
710 end_offset - start_offset);
711
712 return true;
713}
714
715void SourceManager::SourceFileCache::AddSourceFile(const FileSP &file_sp) {
716 FileSpec file_spec = file_sp->GetFileSpec();
717 FileCache::iterator pos = m_file_cache.find(file_spec);
718 if (pos == m_file_cache.end())
719 m_file_cache[file_spec] = file_sp;
720 else {
721 if (file_sp != pos->second)
722 m_file_cache[file_spec] = file_sp;
723 }
724}
725
726SourceManager::FileSP SourceManager::SourceFileCache::FindSourceFile(
727 const FileSpec &file_spec) const {
728 FileSP file_sp;
729 FileCache::const_iterator pos = m_file_cache.find(file_spec);
730 if (pos != m_file_cache.end())
731 file_sp = pos->second;
732 return file_sp;
733}
734

source code of lldb/source/Core/SourceManager.cpp