| //===-- SourceManager.cpp ---------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "lldb/lldb-python.h" |
| |
| #include "lldb/Core/SourceManager.h" |
| |
| // C Includes |
| // C++ Includes |
| // Other libraries and framework includes |
| // Project includes |
| #include "lldb/Core/DataBuffer.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/Stream.h" |
| #include "lldb/Symbol/ClangNamespaceDecl.h" |
| #include "lldb/Symbol/CompileUnit.h" |
| #include "lldb/Symbol/Function.h" |
| #include "lldb/Symbol/SymbolContext.h" |
| #include "lldb/Target/Target.h" |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| |
| static inline bool is_newline_char(char ch) |
| { |
| return ch == '\n' || ch == '\r'; |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| // SourceManager constructor |
| //---------------------------------------------------------------------- |
| SourceManager::SourceManager(const TargetSP &target_sp) : |
| m_last_file_sp (), |
| m_last_line (0), |
| m_last_count (0), |
| m_default_set(false), |
| m_target_wp (target_sp), |
| m_debugger_wp(target_sp->GetDebugger().shared_from_this()) |
| { |
| } |
| |
| SourceManager::SourceManager(const DebuggerSP &debugger_sp) : |
| m_last_file_sp (), |
| m_last_line (0), |
| m_last_count (0), |
| m_default_set(false), |
| m_target_wp (), |
| m_debugger_wp (debugger_sp) |
| { |
| } |
| |
| //---------------------------------------------------------------------- |
| // Destructor |
| //---------------------------------------------------------------------- |
| SourceManager::~SourceManager() |
| { |
| } |
| |
| SourceManager::FileSP |
| SourceManager::GetFile (const FileSpec &file_spec) |
| { |
| bool same_as_previous = m_last_file_sp && m_last_file_sp->FileSpecMatches (file_spec); |
| |
| DebuggerSP debugger_sp (m_debugger_wp.lock()); |
| FileSP file_sp; |
| if (same_as_previous) |
| file_sp = m_last_file_sp; |
| else if (debugger_sp) |
| file_sp = debugger_sp->GetSourceFileCache().FindSourceFile (file_spec); |
| |
| TargetSP target_sp (m_target_wp.lock()); |
| |
| // It the target source path map has been updated, get this file again so we |
| // can successfully remap the source file |
| if (target_sp && file_sp && file_sp->GetSourceMapModificationID() != target_sp->GetSourcePathMap().GetModificationID()) |
| file_sp.reset(); |
| |
| // If file_sp is no good or it points to a non-existent file, reset it. |
| if (!file_sp || !file_sp->GetFileSpec().Exists()) |
| { |
| file_sp.reset (new File (file_spec, target_sp.get())); |
| |
| if (debugger_sp) |
| debugger_sp->GetSourceFileCache().AddSourceFile(file_sp); |
| } |
| return file_sp; |
| } |
| |
| size_t |
| SourceManager::DisplaySourceLinesWithLineNumbersUsingLastFile (uint32_t start_line, |
| uint32_t count, |
| uint32_t curr_line, |
| const char* current_line_cstr, |
| Stream *s, |
| const SymbolContextList *bp_locs) |
| { |
| if (count == 0) |
| return 0; |
| size_t return_value = 0; |
| if (start_line == 0) |
| { |
| if (m_last_line != 0 && m_last_line != UINT32_MAX) |
| start_line = m_last_line + m_last_count; |
| else |
| start_line = 1; |
| } |
| |
| if (!m_default_set) |
| { |
| FileSpec tmp_spec; |
| uint32_t tmp_line; |
| GetDefaultFileAndLine(tmp_spec, tmp_line); |
| } |
| |
| m_last_line = start_line; |
| m_last_count = count; |
| |
| if (m_last_file_sp.get()) |
| { |
| const uint32_t end_line = start_line + count - 1; |
| for (uint32_t line = start_line; line <= end_line; ++line) |
| { |
| if (!m_last_file_sp->LineIsValid (line)) |
| { |
| m_last_line = UINT32_MAX; |
| break; |
| } |
| |
| char prefix[32] = ""; |
| if (bp_locs) |
| { |
| uint32_t bp_count = bp_locs->NumLineEntriesWithLine (line); |
| |
| if (bp_count > 0) |
| ::snprintf (prefix, sizeof (prefix), "[%u] ", bp_count); |
| else |
| ::snprintf (prefix, sizeof (prefix), " "); |
| } |
| |
| return_value += s->Printf("%s%2.2s %-4u\t", |
| prefix, |
| line == curr_line ? current_line_cstr : "", |
| line); |
| size_t this_line_size = m_last_file_sp->DisplaySourceLines (line, 0, 0, s); |
| if (this_line_size == 0) |
| { |
| m_last_line = UINT32_MAX; |
| break; |
| } |
| else |
| return_value += this_line_size; |
| } |
| } |
| return return_value; |
| } |
| |
| size_t |
| SourceManager::DisplaySourceLinesWithLineNumbers |
| ( |
| const FileSpec &file_spec, |
| uint32_t line, |
| uint32_t context_before, |
| uint32_t context_after, |
| const char* current_line_cstr, |
| Stream *s, |
| const SymbolContextList *bp_locs |
| ) |
| { |
| FileSP file_sp (GetFile (file_spec)); |
| |
| uint32_t start_line; |
| uint32_t count = context_before + context_after + 1; |
| if (line > context_before) |
| start_line = line - context_before; |
| else |
| start_line = 1; |
| |
| if (m_last_file_sp.get() != file_sp.get()) |
| { |
| if (line == 0) |
| m_last_line = 0; |
| m_last_file_sp = file_sp; |
| } |
| return DisplaySourceLinesWithLineNumbersUsingLastFile (start_line, count, line, current_line_cstr, s, bp_locs); |
| } |
| |
| size_t |
| SourceManager::DisplayMoreWithLineNumbers (Stream *s, |
| uint32_t count, |
| bool reverse, |
| const SymbolContextList *bp_locs) |
| { |
| // If we get called before anybody has set a default file and line, then try to figure it out here. |
| const bool have_default_file_line = m_last_file_sp && m_last_line > 0; |
| if (!m_default_set) |
| { |
| FileSpec tmp_spec; |
| uint32_t tmp_line; |
| GetDefaultFileAndLine(tmp_spec, tmp_line); |
| } |
| |
| if (m_last_file_sp) |
| { |
| if (m_last_line == UINT32_MAX) |
| return 0; |
| |
| if (reverse && m_last_line == 1) |
| return 0; |
| |
| if (count > 0) |
| m_last_count = count; |
| else if (m_last_count == 0) |
| m_last_count = 10; |
| |
| if (m_last_line > 0) |
| { |
| if (reverse) |
| { |
| // If this is the first time we've done a reverse, then back up one more time so we end |
| // up showing the chunk before the last one we've shown: |
| if (m_last_line > m_last_count) |
| m_last_line -= m_last_count; |
| else |
| m_last_line = 1; |
| } |
| else if (have_default_file_line) |
| m_last_line += m_last_count; |
| } |
| else |
| m_last_line = 1; |
| |
| return DisplaySourceLinesWithLineNumbersUsingLastFile (m_last_line, m_last_count, UINT32_MAX, "", s, bp_locs); |
| } |
| return 0; |
| } |
| |
| bool |
| SourceManager::SetDefaultFileAndLine (const FileSpec &file_spec, uint32_t line) |
| { |
| FileSP old_file_sp = m_last_file_sp; |
| m_last_file_sp = GetFile (file_spec); |
| |
| m_default_set = true; |
| if (m_last_file_sp) |
| { |
| m_last_line = line; |
| return true; |
| } |
| else |
| { |
| m_last_file_sp = old_file_sp; |
| return false; |
| } |
| } |
| |
| bool |
| SourceManager::GetDefaultFileAndLine (FileSpec &file_spec, uint32_t &line) |
| { |
| if (m_last_file_sp) |
| { |
| file_spec = m_last_file_sp->GetFileSpec(); |
| line = m_last_line; |
| return true; |
| } |
| else if (!m_default_set) |
| { |
| TargetSP target_sp (m_target_wp.lock()); |
| |
| if (target_sp) |
| { |
| // If nobody has set the default file and line then try here. If there's no executable, then we |
| // will try again later when there is one. Otherwise, if we can't find it we won't look again, |
| // somebody will have to set it (for instance when we stop somewhere...) |
| Module *executable_ptr = target_sp->GetExecutableModulePointer(); |
| if (executable_ptr) |
| { |
| SymbolContextList sc_list; |
| ConstString main_name("main"); |
| bool symbols_okay = false; // Force it to be a debug symbol. |
| bool inlines_okay = true; |
| bool append = false; |
| size_t num_matches = executable_ptr->FindFunctions (main_name, |
| NULL, |
| lldb::eFunctionNameTypeBase, |
| inlines_okay, |
| symbols_okay, |
| append, |
| sc_list); |
| for (size_t idx = 0; idx < num_matches; idx++) |
| { |
| SymbolContext sc; |
| sc_list.GetContextAtIndex(idx, sc); |
| if (sc.function) |
| { |
| lldb_private::LineEntry line_entry; |
| if (sc.function->GetAddressRange().GetBaseAddress().CalculateSymbolContextLineEntry (line_entry)) |
| { |
| SetDefaultFileAndLine (line_entry.file, |
| line_entry.line); |
| file_spec = m_last_file_sp->GetFileSpec(); |
| line = m_last_line; |
| return true; |
| } |
| } |
| } |
| } |
| } |
| } |
| return false; |
| } |
| |
| void |
| SourceManager::FindLinesMatchingRegex (FileSpec &file_spec, |
| RegularExpression& regex, |
| uint32_t start_line, |
| uint32_t end_line, |
| std::vector<uint32_t> &match_lines) |
| { |
| match_lines.clear(); |
| FileSP file_sp = GetFile (file_spec); |
| if (!file_sp) |
| return; |
| return file_sp->FindLinesMatchingRegex (regex, start_line, end_line, match_lines); |
| } |
| |
| SourceManager::File::File(const FileSpec &file_spec, Target *target) : |
| m_file_spec_orig (file_spec), |
| m_file_spec(file_spec), |
| m_mod_time (file_spec.GetModificationTime()), |
| m_source_map_mod_id (0), |
| m_data_sp(), |
| m_offsets() |
| { |
| if (!m_mod_time.IsValid()) |
| { |
| if (target) |
| { |
| m_source_map_mod_id = target->GetSourcePathMap().GetModificationID(); |
| |
| if (!file_spec.GetDirectory() && file_spec.GetFilename()) |
| { |
| // If this is just a file name, lets see if we can find it in the target: |
| bool check_inlines = false; |
| SymbolContextList sc_list; |
| size_t num_matches = target->GetImages().ResolveSymbolContextForFilePath (file_spec.GetFilename().AsCString(), |
| 0, |
| check_inlines, |
| lldb::eSymbolContextModule | lldb::eSymbolContextCompUnit, |
| sc_list); |
| bool got_multiple = false; |
| if (num_matches != 0) |
| { |
| if (num_matches > 1) |
| { |
| SymbolContext sc; |
| FileSpec *test_cu_spec = NULL; |
| |
| for (unsigned i = 0; i < num_matches; i++) |
| { |
| sc_list.GetContextAtIndex(i, sc); |
| if (sc.comp_unit) |
| { |
| if (test_cu_spec) |
| { |
| if (test_cu_spec != static_cast<FileSpec *> (sc.comp_unit)) |
| got_multiple = true; |
| break; |
| } |
| else |
| test_cu_spec = sc.comp_unit; |
| } |
| } |
| } |
| if (!got_multiple) |
| { |
| SymbolContext sc; |
| sc_list.GetContextAtIndex (0, sc); |
| m_file_spec = sc.comp_unit; |
| m_mod_time = m_file_spec.GetModificationTime(); |
| } |
| } |
| } |
| // Try remapping if m_file_spec does not correspond to an existing file. |
| if (!m_file_spec.Exists()) |
| { |
| FileSpec new_file_spec; |
| // Check target specific source remappings first, then fall back to |
| // modules objects can have individual path remappings that were detected |
| // when the debug info for a module was found. |
| // then |
| if (target->GetSourcePathMap().FindFile (m_file_spec, new_file_spec) || |
| target->GetImages().FindSourceFile (m_file_spec, new_file_spec)) |
| { |
| m_file_spec = new_file_spec; |
| m_mod_time = m_file_spec.GetModificationTime(); |
| } |
| } |
| } |
| } |
| |
| if (m_mod_time.IsValid()) |
| m_data_sp = m_file_spec.ReadFileContents (); |
| } |
| |
| SourceManager::File::~File() |
| { |
| } |
| |
| uint32_t |
| SourceManager::File::GetLineOffset (uint32_t line) |
| { |
| if (line == 0) |
| return UINT32_MAX; |
| |
| if (line == 1) |
| return 0; |
| |
| if (CalculateLineOffsets (line)) |
| { |
| if (line < m_offsets.size()) |
| return m_offsets[line - 1]; // yes we want "line - 1" in the index |
| } |
| return UINT32_MAX; |
| } |
| |
| uint32_t |
| SourceManager::File::GetNumLines () |
| { |
| CalculateLineOffsets(); |
| return m_offsets.size(); |
| } |
| |
| const char * |
| SourceManager::File::PeekLineData (uint32_t line) |
| { |
| if (!LineIsValid(line)) |
| return NULL; |
| |
| size_t line_offset = GetLineOffset (line); |
| if (line_offset < m_data_sp->GetByteSize()) |
| return (const char *)m_data_sp->GetBytes() + line_offset; |
| return NULL; |
| } |
| |
| uint32_t |
| SourceManager::File::GetLineLength (uint32_t line, bool include_newline_chars) |
| { |
| if (!LineIsValid(line)) |
| return false; |
| |
| size_t start_offset = GetLineOffset (line); |
| size_t end_offset = GetLineOffset (line + 1); |
| if (end_offset == UINT32_MAX) |
| end_offset = m_data_sp->GetByteSize(); |
| |
| if (end_offset > start_offset) |
| { |
| uint32_t length = end_offset - start_offset; |
| if (include_newline_chars == false) |
| { |
| const char *line_start = (const char *)m_data_sp->GetBytes() + start_offset; |
| while (length > 0) |
| { |
| const char last_char = line_start[length-1]; |
| if ((last_char == '\r') || (last_char == '\n')) |
| --length; |
| else |
| break; |
| } |
| } |
| return length; |
| } |
| return 0; |
| } |
| |
| bool |
| SourceManager::File::LineIsValid (uint32_t line) |
| { |
| if (line == 0) |
| return false; |
| |
| if (CalculateLineOffsets (line)) |
| return line < m_offsets.size(); |
| return false; |
| } |
| |
| size_t |
| SourceManager::File::DisplaySourceLines (uint32_t line, uint32_t context_before, uint32_t context_after, Stream *s) |
| { |
| // TODO: use host API to sign up for file modifications to anything in our |
| // source cache and only update when we determine a file has been updated. |
| // For now we check each time we want to display info for the file. |
| TimeValue curr_mod_time (m_file_spec.GetModificationTime()); |
| |
| if (curr_mod_time.IsValid() && m_mod_time != curr_mod_time) |
| { |
| m_mod_time = curr_mod_time; |
| m_data_sp = m_file_spec.ReadFileContents (); |
| m_offsets.clear(); |
| } |
| |
| // Sanity check m_data_sp before proceeding. |
| if (!m_data_sp) |
| return 0; |
| |
| const uint32_t start_line = line <= context_before ? 1 : line - context_before; |
| const uint32_t start_line_offset = GetLineOffset (start_line); |
| if (start_line_offset != UINT32_MAX) |
| { |
| const uint32_t end_line = line + context_after; |
| uint32_t end_line_offset = GetLineOffset (end_line + 1); |
| if (end_line_offset == UINT32_MAX) |
| end_line_offset = m_data_sp->GetByteSize(); |
| |
| assert (start_line_offset <= end_line_offset); |
| size_t bytes_written = 0; |
| if (start_line_offset < end_line_offset) |
| { |
| size_t count = end_line_offset - start_line_offset; |
| const uint8_t *cstr = m_data_sp->GetBytes() + start_line_offset; |
| bytes_written = s->Write(cstr, count); |
| if (!is_newline_char(cstr[count-1])) |
| bytes_written += s->EOL(); |
| } |
| return bytes_written; |
| } |
| return 0; |
| } |
| |
| void |
| SourceManager::File::FindLinesMatchingRegex (RegularExpression& regex, uint32_t start_line, uint32_t end_line, std::vector<uint32_t> &match_lines) |
| { |
| TimeValue curr_mod_time (m_file_spec.GetModificationTime()); |
| if (m_mod_time != curr_mod_time) |
| { |
| m_mod_time = curr_mod_time; |
| m_data_sp = m_file_spec.ReadFileContents (); |
| m_offsets.clear(); |
| } |
| |
| match_lines.clear(); |
| |
| if (!LineIsValid(start_line) || (end_line != UINT32_MAX && !LineIsValid(end_line))) |
| return; |
| if (start_line > end_line) |
| return; |
| |
| for (uint32_t line_no = start_line; line_no < end_line; line_no++) |
| { |
| std::string buffer; |
| if (!GetLine (line_no, buffer)) |
| break; |
| if (regex.Execute(buffer.c_str())) |
| { |
| match_lines.push_back(line_no); |
| } |
| } |
| } |
| |
| bool |
| SourceManager::File::FileSpecMatches (const FileSpec &file_spec) |
| { |
| return FileSpec::Equal (m_file_spec, file_spec, false); |
| } |
| |
| bool |
| lldb_private::operator== (const SourceManager::File &lhs, const SourceManager::File &rhs) |
| { |
| if (lhs.m_file_spec == rhs.m_file_spec) |
| { |
| if (lhs.m_mod_time.IsValid()) |
| { |
| if (rhs.m_mod_time.IsValid()) |
| return lhs.m_mod_time == rhs.m_mod_time; |
| else |
| return false; |
| } |
| else if (rhs.m_mod_time.IsValid()) |
| return false; |
| else |
| return true; |
| } |
| else |
| return false; |
| } |
| |
| bool |
| SourceManager::File::CalculateLineOffsets (uint32_t line) |
| { |
| line = UINT32_MAX; // TODO: take this line out when we support partial indexing |
| if (line == UINT32_MAX) |
| { |
| // Already done? |
| if (!m_offsets.empty() && m_offsets[0] == UINT32_MAX) |
| return true; |
| |
| if (m_offsets.empty()) |
| { |
| if (m_data_sp.get() == NULL) |
| return false; |
| |
| const char *start = (char *)m_data_sp->GetBytes(); |
| if (start) |
| { |
| const char *end = start + m_data_sp->GetByteSize(); |
| |
| // Calculate all line offsets from scratch |
| |
| // Push a 1 at index zero to indicate the file has been completely indexed. |
| m_offsets.push_back(UINT32_MAX); |
| const char *s; |
| for (s = start; s < end; ++s) |
| { |
| char curr_ch = *s; |
| if (is_newline_char (curr_ch)) |
| { |
| if (s + 1 < end) |
| { |
| char next_ch = s[1]; |
| if (is_newline_char (next_ch)) |
| { |
| if (curr_ch != next_ch) |
| ++s; |
| } |
| } |
| m_offsets.push_back(s + 1 - start); |
| } |
| } |
| if (!m_offsets.empty()) |
| { |
| if (m_offsets.back() < end - start) |
| m_offsets.push_back(end - start); |
| } |
| return true; |
| } |
| } |
| else |
| { |
| // Some lines have been populated, start where we last left off |
| assert("Not implemented yet" == NULL); |
| } |
| |
| } |
| else |
| { |
| // Calculate all line offsets up to "line" |
| assert("Not implemented yet" == NULL); |
| } |
| return false; |
| } |
| |
| bool |
| SourceManager::File::GetLine (uint32_t line_no, std::string &buffer) |
| { |
| if (!LineIsValid(line_no)) |
| return false; |
| |
| size_t start_offset = GetLineOffset (line_no); |
| size_t end_offset = GetLineOffset (line_no + 1); |
| if (end_offset == UINT32_MAX) |
| { |
| end_offset = m_data_sp->GetByteSize(); |
| } |
| buffer.assign((char *) m_data_sp->GetBytes() + start_offset, end_offset - start_offset); |
| |
| return true; |
| } |
| |
| void |
| SourceManager::SourceFileCache::AddSourceFile (const FileSP &file_sp) |
| { |
| FileSpec file_spec; |
| FileCache::iterator pos = m_file_cache.find(file_spec); |
| if (pos == m_file_cache.end()) |
| m_file_cache[file_spec] = file_sp; |
| else |
| { |
| if (file_sp != pos->second) |
| m_file_cache[file_spec] = file_sp; |
| } |
| } |
| |
| SourceManager::FileSP |
| SourceManager::SourceFileCache::FindSourceFile (const FileSpec &file_spec) const |
| { |
| FileSP file_sp; |
| FileCache::const_iterator pos = m_file_cache.find(file_spec); |
| if (pos != m_file_cache.end()) |
| file_sp = pos->second; |
| return file_sp; |
| } |
| |
