1 //===-- DWARFDebugLine.h ----------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef SymbolFileDWARF_DWARFDebugLine_h_
11 #define SymbolFileDWARF_DWARFDebugLine_h_
17 #include "lldb/lldb-private.h"
19 #include "DWARFDefines.h"
21 class SymbolFileDWARF;
22 class DWARFDebugInfoEntry;
24 //----------------------------------------------------------------------
26 //----------------------------------------------------------------------
30 //------------------------------------------------------------------
32 //------------------------------------------------------------------
45 dw_sleb128_t mod_time;
50 //------------------------------------------------------------------
52 //------------------------------------------------------------------
65 standard_opcode_lengths(),
66 include_directories(),
71 typedef std::shared_ptr<Prologue> shared_ptr;
73 uint32_t total_length; // The size in bytes of the statement information for this compilation unit (not including the total_length field itself).
74 uint16_t version; // Version identifier for the statement information format.
75 uint32_t prologue_length;// The number of bytes following the prologue_length field to the beginning of the first byte of the statement program itself.
76 uint8_t min_inst_length;// The size in bytes of the smallest target machine instruction. Statement program opcodes that alter the address register first multiply their operands by this value.
77 uint8_t default_is_stmt;// The initial value of theis_stmtregister.
78 int8_t line_base; // This parameter affects the meaning of the special opcodes. See below.
79 uint8_t line_range; // This parameter affects the meaning of the special opcodes. See below.
80 uint8_t opcode_base; // The number assigned to the first special opcode.
81 std::vector<uint8_t> standard_opcode_lengths;
82 std::vector<std::string> include_directories;
83 std::vector<FileNameEntry> file_names;
85 // Length of the prologue in bytes
86 uint32_t Length() const { return prologue_length + sizeof(total_length) + sizeof(version) + sizeof(prologue_length); }
87 // Length of the line table data in bytes (not including the prologue)
88 uint32_t StatementTableLength() const { return total_length + sizeof(total_length) - Length(); }
89 int32_t MaxLineIncrementForSpecialOpcode() const { return line_base + (int8_t)line_range - 1; }
91 // void Append(BinaryStreamBuf& buff) const;
92 void Dump (lldb_private::Log *log);
95 total_length = version = prologue_length = min_inst_length = line_base = line_range = opcode_base = 0;
97 standard_opcode_lengths.clear();
98 include_directories.clear();
101 bool GetFile(uint32_t file_idx, std::string& file, std::string& dir) const;
105 // Standard .debug_line state machine structure
108 typedef std::vector<Row> collection;
109 typedef collection::iterator iterator;
110 typedef collection::const_iterator const_iterator;
112 Row(bool default_is_stmt = false);
115 void Reset(bool default_is_stmt);
116 void Dump(lldb_private::Log *log) const;
117 static void Insert(Row::collection& state_coll, const Row& state);
118 static void Dump(lldb_private::Log *log, const Row::collection& state_coll);
120 dw_addr_t address; // The program-counter value corresponding to a machine instruction generated by the compiler.
121 uint32_t line; // An unsigned integer indicating a source line number. Lines are numbered beginning at 1. The compiler may emit the value 0 in cases where an instruction cannot be attributed to any source line.
122 uint16_t column; // An unsigned integer indicating a column number within a source line. Columns are numbered beginning at 1. The value 0 is reserved to indicate that a statement begins at the 'left edge' of the line.
123 uint16_t file; // An unsigned integer indicating the identity of the source file corresponding to a machine instruction.
124 uint8_t is_stmt:1, // A boolean indicating that the current instruction is the beginning of a statement.
125 basic_block:1, // A boolean indicating that the current instruction is the beginning of a basic block.
126 end_sequence:1, // A boolean indicating that the current address is that of the first byte after the end of a sequence of target machine instructions.
127 prologue_end:1, // A boolean indicating that the current address is one (of possibly many) where execution should be suspended for an entry breakpoint of a function.
128 epilogue_begin:1;// A boolean indicating that the current address is one (of possibly many) where execution should be suspended for an exit breakpoint of a function.
129 uint32_t isa; // An unsigned integer whose value encodes the applicable instruction set architecture for the current instruction.
133 //------------------------------------------------------------------
135 //------------------------------------------------------------------
138 typedef std::shared_ptr<LineTable> shared_ptr;
146 void AppendRow(const DWARFDebugLine::Row& state);
153 uint32_t LookupAddress(dw_addr_t address, dw_addr_t cu_high_pc) const;
154 void Dump(lldb_private::Log *log) const;
156 Prologue::shared_ptr prologue;
157 Row::collection rows;
160 //------------------------------------------------------------------
162 //------------------------------------------------------------------
163 struct State : public Row
165 typedef void (*Callback)(dw_offset_t offset, const State& state, void* userData);
167 // Special row codes used when calling the callback
170 StartParsingLineTable = 0,
171 DoneParsingLineTable = -1
174 State (Prologue::shared_ptr& prologue_sp,
175 lldb_private::Log *log,
180 AppendRowToMatrix (dw_offset_t offset);
183 Finalize (dw_offset_t offset);
188 Prologue::shared_ptr prologue;
189 lldb_private::Log *log;
190 Callback callback; // Callback function that gets called each time an entry is to be added to the matrix
191 void* callbackUserData;
192 int row; // The row number that starts at zero for the prologue, and increases for each row added to the matrix
194 DISALLOW_COPY_AND_ASSIGN (State);
197 static bool DumpOpcodes(lldb_private::Log *log, SymbolFileDWARF* dwarf2Data, dw_offset_t line_offset = DW_INVALID_OFFSET, uint32_t dump_flags = 0); // If line_offset is invalid, dump everything
198 static bool DumpLineTableRows(lldb_private::Log *log, SymbolFileDWARF* dwarf2Data, dw_offset_t line_offset = DW_INVALID_OFFSET); // If line_offset is invalid, dump everything
199 static bool ParseSupportFiles(const lldb::ModuleSP &module_sp, const lldb_private::DataExtractor& debug_line_data, const char *cu_comp_dir, dw_offset_t stmt_list, lldb_private::FileSpecList &support_files);
200 static bool ParsePrologue(const lldb_private::DataExtractor& debug_line_data, lldb::offset_t* offset_ptr, Prologue* prologue);
201 static bool ParseStatementTable(const lldb_private::DataExtractor& debug_line_data, lldb::offset_t* offset_ptr, State::Callback callback, void* userData);
202 static dw_offset_t DumpStatementTable(lldb_private::Log *log, const lldb_private::DataExtractor& debug_line_data, const dw_offset_t line_offset);
203 static dw_offset_t DumpStatementOpcodes(lldb_private::Log *log, const lldb_private::DataExtractor& debug_line_data, const dw_offset_t line_offset, uint32_t flags);
204 static bool ParseStatementTable(const lldb_private::DataExtractor& debug_line_data, lldb::offset_t *offset_ptr, LineTable* line_table);
205 static void Parse(const lldb_private::DataExtractor& debug_line_data, DWARFDebugLine::State::Callback callback, void* userData);
206 // static void AppendLineTableData(const DWARFDebugLine::Prologue* prologue, const DWARFDebugLine::Row::collection& state_coll, const uint32_t addr_size, BinaryStreamBuf &debug_line_data);
213 void Parse(const lldb_private::DataExtractor& debug_line_data);
214 void ParseIfNeeded(const lldb_private::DataExtractor& debug_line_data);
215 LineTable::shared_ptr GetLineTable(const dw_offset_t offset) const;
218 typedef std::map<dw_offset_t, LineTable::shared_ptr> LineTableMap;
219 typedef LineTableMap::iterator LineTableIter;
220 typedef LineTableMap::const_iterator LineTableConstIter;
222 LineTableMap m_lineTableMap;
225 #endif // SymbolFileDWARF_DWARFDebugLine_h_