diff options
Diffstat (limited to 'lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp')
| -rw-r--r-- | lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp | 1903 |
1 files changed, 903 insertions, 1000 deletions
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp b/lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp index 180e47df6fd..d3f4d24e4ce 100644 --- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp +++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp @@ -18,8 +18,8 @@ #include "lldb/Core/Timer.h" #include "lldb/Host/Host.h" -#include "SymbolFileDWARF.h" #include "LogChannelDWARF.h" +#include "SymbolFileDWARF.h" using namespace lldb; using namespace lldb_private; @@ -31,359 +31,329 @@ using namespace std; // Parse all information in the debug_line_data into an internal // representation. //---------------------------------------------------------------------- -void -DWARFDebugLine::Parse(const DWARFDataExtractor& debug_line_data) -{ - m_lineTableMap.clear(); - lldb::offset_t offset = 0; - LineTable::shared_ptr line_table_sp(new LineTable); - while (debug_line_data.ValidOffset(offset)) - { - const lldb::offset_t debug_line_offset = offset; - - if (line_table_sp.get() == NULL) - break; - - if (ParseStatementTable(debug_line_data, &offset, line_table_sp.get())) - { - // Make sure we don't don't loop infinitely - if (offset <= debug_line_offset) - break; - //DEBUG_PRINTF("m_lineTableMap[0x%8.8x] = line_table_sp\n", debug_line_offset); - m_lineTableMap[debug_line_offset] = line_table_sp; - line_table_sp.reset(new LineTable); - } - else - ++offset; // Try next byte in line table - } +void DWARFDebugLine::Parse(const DWARFDataExtractor &debug_line_data) { + m_lineTableMap.clear(); + lldb::offset_t offset = 0; + LineTable::shared_ptr line_table_sp(new LineTable); + while (debug_line_data.ValidOffset(offset)) { + const lldb::offset_t debug_line_offset = offset; + + if (line_table_sp.get() == NULL) + break; + + if (ParseStatementTable(debug_line_data, &offset, line_table_sp.get())) { + // Make sure we don't don't loop infinitely + if (offset <= debug_line_offset) + break; + // DEBUG_PRINTF("m_lineTableMap[0x%8.8x] = line_table_sp\n", + // debug_line_offset); + m_lineTableMap[debug_line_offset] = line_table_sp; + line_table_sp.reset(new LineTable); + } else + ++offset; // Try next byte in line table + } } -void -DWARFDebugLine::ParseIfNeeded(const DWARFDataExtractor& debug_line_data) -{ - if (m_lineTableMap.empty()) - Parse(debug_line_data); +void DWARFDebugLine::ParseIfNeeded(const DWARFDataExtractor &debug_line_data) { + if (m_lineTableMap.empty()) + Parse(debug_line_data); } - //---------------------------------------------------------------------- // DWARFDebugLine::GetLineTable //---------------------------------------------------------------------- DWARFDebugLine::LineTable::shared_ptr -DWARFDebugLine::GetLineTable(const dw_offset_t offset) const -{ - DWARFDebugLine::LineTable::shared_ptr line_table_shared_ptr; - LineTableConstIter pos = m_lineTableMap.find(offset); - if (pos != m_lineTableMap.end()) - line_table_shared_ptr = pos->second; - return line_table_shared_ptr; +DWARFDebugLine::GetLineTable(const dw_offset_t offset) const { + DWARFDebugLine::LineTable::shared_ptr line_table_shared_ptr; + LineTableConstIter pos = m_lineTableMap.find(offset); + if (pos != m_lineTableMap.end()) + line_table_shared_ptr = pos->second; + return line_table_shared_ptr; } - //---------------------------------------------------------------------- // DumpStateToFile //---------------------------------------------------------------------- -static void -DumpStateToFile (dw_offset_t offset, const DWARFDebugLine::State& state, void* userData) -{ - Log *log = (Log *)userData; - if (state.row == DWARFDebugLine::State::StartParsingLineTable) - { - // If the row is zero we are being called with the prologue only - state.prologue->Dump (log); - log->PutCString ("Address Line Column File"); - log->PutCString ("------------------ ------ ------ ------"); - } - else if (state.row == DWARFDebugLine::State::DoneParsingLineTable) - { - // Done parsing line table - } - else - { - log->Printf( "0x%16.16" PRIx64 " %6u %6u %6u%s\n", state.address, state.line, state.column, state.file, state.end_sequence ? " END" : ""); - } +static void DumpStateToFile(dw_offset_t offset, + const DWARFDebugLine::State &state, + void *userData) { + Log *log = (Log *)userData; + if (state.row == DWARFDebugLine::State::StartParsingLineTable) { + // If the row is zero we are being called with the prologue only + state.prologue->Dump(log); + log->PutCString("Address Line Column File"); + log->PutCString("------------------ ------ ------ ------"); + } else if (state.row == DWARFDebugLine::State::DoneParsingLineTable) { + // Done parsing line table + } else { + log->Printf("0x%16.16" PRIx64 " %6u %6u %6u%s\n", state.address, state.line, + state.column, state.file, state.end_sequence ? " END" : ""); + } } //---------------------------------------------------------------------- // DWARFDebugLine::DumpLineTableRows //---------------------------------------------------------------------- -bool -DWARFDebugLine::DumpLineTableRows(Log *log, SymbolFileDWARF* dwarf2Data, dw_offset_t debug_line_offset) -{ - const DWARFDataExtractor& debug_line_data = dwarf2Data->get_debug_line_data(); - - if (debug_line_offset == DW_INVALID_OFFSET) - { - // Dump line table to a single file only - debug_line_offset = 0; - while (debug_line_data.ValidOffset(debug_line_offset)) - debug_line_offset = DumpStatementTable (log, debug_line_data, debug_line_offset); - } - else - { - // Dump line table to a single file only - DumpStatementTable (log, debug_line_data, debug_line_offset); - } - return false; +bool DWARFDebugLine::DumpLineTableRows(Log *log, SymbolFileDWARF *dwarf2Data, + dw_offset_t debug_line_offset) { + const DWARFDataExtractor &debug_line_data = dwarf2Data->get_debug_line_data(); + + if (debug_line_offset == DW_INVALID_OFFSET) { + // Dump line table to a single file only + debug_line_offset = 0; + while (debug_line_data.ValidOffset(debug_line_offset)) + debug_line_offset = + DumpStatementTable(log, debug_line_data, debug_line_offset); + } else { + // Dump line table to a single file only + DumpStatementTable(log, debug_line_data, debug_line_offset); + } + return false; } //---------------------------------------------------------------------- // DWARFDebugLine::DumpStatementTable //---------------------------------------------------------------------- dw_offset_t -DWARFDebugLine::DumpStatementTable(Log *log, const DWARFDataExtractor& debug_line_data, const dw_offset_t debug_line_offset) -{ - if (debug_line_data.ValidOffset(debug_line_offset)) - { - lldb::offset_t offset = debug_line_offset; - log->Printf( "----------------------------------------------------------------------\n" - "debug_line[0x%8.8x]\n" - "----------------------------------------------------------------------\n", debug_line_offset); - - if (ParseStatementTable(debug_line_data, &offset, DumpStateToFile, log)) - return offset; - else - return debug_line_offset + 1; // Skip to next byte in .debug_line section - } +DWARFDebugLine::DumpStatementTable(Log *log, + const DWARFDataExtractor &debug_line_data, + const dw_offset_t debug_line_offset) { + if (debug_line_data.ValidOffset(debug_line_offset)) { + lldb::offset_t offset = debug_line_offset; + log->Printf("--------------------------------------------------------------" + "--------\n" + "debug_line[0x%8.8x]\n" + "--------------------------------------------------------------" + "--------\n", + debug_line_offset); + + if (ParseStatementTable(debug_line_data, &offset, DumpStateToFile, log)) + return offset; + else + return debug_line_offset + 1; // Skip to next byte in .debug_line section + } - return DW_INVALID_OFFSET; + return DW_INVALID_OFFSET; } - //---------------------------------------------------------------------- // DumpOpcodes //---------------------------------------------------------------------- -bool -DWARFDebugLine::DumpOpcodes(Log *log, SymbolFileDWARF* dwarf2Data, dw_offset_t debug_line_offset, uint32_t dump_flags) -{ - const DWARFDataExtractor& debug_line_data = dwarf2Data->get_debug_line_data(); - - if (debug_line_data.GetByteSize() == 0) - { - log->Printf( "< EMPTY >\n"); - return false; - } +bool DWARFDebugLine::DumpOpcodes(Log *log, SymbolFileDWARF *dwarf2Data, + dw_offset_t debug_line_offset, + uint32_t dump_flags) { + const DWARFDataExtractor &debug_line_data = dwarf2Data->get_debug_line_data(); - if (debug_line_offset == DW_INVALID_OFFSET) - { - // Dump line table to a single file only - debug_line_offset = 0; - while (debug_line_data.ValidOffset(debug_line_offset)) - debug_line_offset = DumpStatementOpcodes (log, debug_line_data, debug_line_offset, dump_flags); - } - else - { - // Dump line table to a single file only - DumpStatementOpcodes (log, debug_line_data, debug_line_offset, dump_flags); - } + if (debug_line_data.GetByteSize() == 0) { + log->Printf("< EMPTY >\n"); return false; + } + + if (debug_line_offset == DW_INVALID_OFFSET) { + // Dump line table to a single file only + debug_line_offset = 0; + while (debug_line_data.ValidOffset(debug_line_offset)) + debug_line_offset = DumpStatementOpcodes(log, debug_line_data, + debug_line_offset, dump_flags); + } else { + // Dump line table to a single file only + DumpStatementOpcodes(log, debug_line_data, debug_line_offset, dump_flags); + } + return false; } //---------------------------------------------------------------------- // DumpStatementOpcodes //---------------------------------------------------------------------- -dw_offset_t -DWARFDebugLine::DumpStatementOpcodes(Log *log, const DWARFDataExtractor& debug_line_data, const dw_offset_t debug_line_offset, uint32_t flags) -{ - lldb::offset_t offset = debug_line_offset; - if (debug_line_data.ValidOffset(offset)) - { - Prologue prologue; - - if (ParsePrologue(debug_line_data, &offset, &prologue)) - { - log->PutCString ("----------------------------------------------------------------------"); - log->Printf ("debug_line[0x%8.8x]", debug_line_offset); - log->PutCString ("----------------------------------------------------------------------\n"); - prologue.Dump (log); - } - else - { - offset = debug_line_offset; - log->Printf( "0x%8.8" PRIx64 ": skipping pad byte %2.2x", offset, debug_line_data.GetU8(&offset)); - return offset; - } - - Row row(prologue.default_is_stmt); - const dw_offset_t end_offset = debug_line_offset + prologue.total_length + sizeof(prologue.total_length); +dw_offset_t DWARFDebugLine::DumpStatementOpcodes( + Log *log, const DWARFDataExtractor &debug_line_data, + const dw_offset_t debug_line_offset, uint32_t flags) { + lldb::offset_t offset = debug_line_offset; + if (debug_line_data.ValidOffset(offset)) { + Prologue prologue; - assert(debug_line_data.ValidOffset(end_offset-1)); + if (ParsePrologue(debug_line_data, &offset, &prologue)) { + log->PutCString("--------------------------------------------------------" + "--------------"); + log->Printf("debug_line[0x%8.8x]", debug_line_offset); + log->PutCString("--------------------------------------------------------" + "--------------\n"); + prologue.Dump(log); + } else { + offset = debug_line_offset; + log->Printf("0x%8.8" PRIx64 ": skipping pad byte %2.2x", offset, + debug_line_data.GetU8(&offset)); + return offset; + } - while (offset < end_offset) - { - const uint32_t op_offset = offset; - uint8_t opcode = debug_line_data.GetU8(&offset); - switch (opcode) - { - case 0: // Extended Opcodes always start with a zero opcode followed by - { // a uleb128 length so you can skip ones you don't know about - - dw_offset_t ext_offset = offset; - dw_uleb128_t len = debug_line_data.GetULEB128(&offset); - dw_offset_t arg_size = len - (offset - ext_offset); - uint8_t sub_opcode = debug_line_data.GetU8(&offset); -// if (verbose) -// log->Printf( "Extended: <%u> %2.2x ", len, sub_opcode); - - switch (sub_opcode) - { - case DW_LNE_end_sequence : - log->Printf( "0x%8.8x: DW_LNE_end_sequence", op_offset); - row.Dump(log); - row.Reset(prologue.default_is_stmt); - break; - - case DW_LNE_set_address : - { - row.address = debug_line_data.GetMaxU64(&offset, arg_size); - log->Printf( "0x%8.8x: DW_LNE_set_address (0x%" PRIx64 ")", op_offset, row.address); - } - break; - - case DW_LNE_define_file: - { - FileNameEntry fileEntry; - fileEntry.name = debug_line_data.GetCStr(&offset); - fileEntry.dir_idx = debug_line_data.GetULEB128(&offset); - fileEntry.mod_time = debug_line_data.GetULEB128(&offset); - fileEntry.length = debug_line_data.GetULEB128(&offset); - log->Printf( "0x%8.8x: DW_LNE_define_file('%s', dir=%i, mod_time=0x%8.8x, length=%i )", - op_offset, - fileEntry.name, - fileEntry.dir_idx, - fileEntry.mod_time, - fileEntry.length); - prologue.file_names.push_back(fileEntry); - } - break; - - case DW_LNE_set_discriminator: - { - uint64_t discriminator = debug_line_data.GetULEB128(&offset); - log->Printf( "0x%8.8x: DW_LNE_set_discriminator (0x%" PRIx64 ")", op_offset, discriminator); - } - break; - default: - log->Printf( "0x%8.8x: DW_LNE_??? (%2.2x) - Skipping unknown upcode", op_offset, opcode); - // Length doesn't include the zero opcode byte or the length itself, but - // it does include the sub_opcode, so we have to adjust for that below - offset += arg_size; - break; - } - } - break; - - // Standard Opcodes - case DW_LNS_copy: - log->Printf( "0x%8.8x: DW_LNS_copy", op_offset); - row.Dump (log); - break; - - case DW_LNS_advance_pc: - { - dw_uleb128_t addr_offset_n = debug_line_data.GetULEB128(&offset); - dw_uleb128_t addr_offset = addr_offset_n * prologue.min_inst_length; - log->Printf( "0x%8.8x: DW_LNS_advance_pc (0x%x)", op_offset, addr_offset); - row.address += addr_offset; - } - break; - - case DW_LNS_advance_line: - { - dw_sleb128_t line_offset = debug_line_data.GetSLEB128(&offset); - log->Printf( "0x%8.8x: DW_LNS_advance_line (%i)", op_offset, line_offset); - row.line += line_offset; - } - break; - - case DW_LNS_set_file: - row.file = debug_line_data.GetULEB128(&offset); - log->Printf( "0x%8.8x: DW_LNS_set_file (%u)", op_offset, row.file); - break; - - case DW_LNS_set_column: - row.column = debug_line_data.GetULEB128(&offset); - log->Printf( "0x%8.8x: DW_LNS_set_column (%u)", op_offset, row.column); - break; - - case DW_LNS_negate_stmt: - row.is_stmt = !row.is_stmt; - log->Printf( "0x%8.8x: DW_LNS_negate_stmt", op_offset); - break; - - case DW_LNS_set_basic_block: - row.basic_block = true; - log->Printf( "0x%8.8x: DW_LNS_set_basic_block", op_offset); - break; - - case DW_LNS_const_add_pc: - { - uint8_t adjust_opcode = 255 - prologue.opcode_base; - dw_addr_t addr_offset = (adjust_opcode / prologue.line_range) * prologue.min_inst_length; - log->Printf( "0x%8.8x: DW_LNS_const_add_pc (0x%8.8" PRIx64 ")", op_offset, addr_offset); - row.address += addr_offset; - } - break; - - case DW_LNS_fixed_advance_pc: - { - uint16_t pc_offset = debug_line_data.GetU16(&offset); - log->Printf( "0x%8.8x: DW_LNS_fixed_advance_pc (0x%4.4x)", op_offset, pc_offset); - row.address += pc_offset; - } - break; - - case DW_LNS_set_prologue_end: - row.prologue_end = true; - log->Printf( "0x%8.8x: DW_LNS_set_prologue_end", op_offset); - break; - - case DW_LNS_set_epilogue_begin: - row.epilogue_begin = true; - log->Printf( "0x%8.8x: DW_LNS_set_epilogue_begin", op_offset); - break; - - case DW_LNS_set_isa: - row.isa = debug_line_data.GetULEB128(&offset); - log->Printf( "0x%8.8x: DW_LNS_set_isa (%u)", op_offset, row.isa); - break; - - // Special Opcodes - default: - if (opcode < prologue.opcode_base) - { - // We have an opcode that this parser doesn't know about, skip - // the number of ULEB128 numbers that is says to skip in the - // prologue's standard_opcode_lengths array - uint8_t n = prologue.standard_opcode_lengths[opcode-1]; - log->Printf( "0x%8.8x: Special : Unknown skipping %u ULEB128 values.", op_offset, n); - while (n > 0) - { - debug_line_data.GetULEB128(&offset); - --n; - } - } - else - { - uint8_t adjust_opcode = opcode - prologue.opcode_base; - dw_addr_t addr_offset = (adjust_opcode / prologue.line_range) * prologue.min_inst_length; - int32_t line_offset = prologue.line_base + (adjust_opcode % prologue.line_range); - log->Printf("0x%8.8x: address += 0x%" PRIx64 ", line += %i\n", op_offset, (uint64_t)addr_offset, line_offset); - row.address += addr_offset; - row.line += line_offset; - row.Dump (log); - } - break; - } + Row row(prologue.default_is_stmt); + const dw_offset_t end_offset = debug_line_offset + prologue.total_length + + sizeof(prologue.total_length); + + assert(debug_line_data.ValidOffset(end_offset - 1)); + + while (offset < end_offset) { + const uint32_t op_offset = offset; + uint8_t opcode = debug_line_data.GetU8(&offset); + switch (opcode) { + case 0: // Extended Opcodes always start with a zero opcode followed by + { // a uleb128 length so you can skip ones you don't know about + + dw_offset_t ext_offset = offset; + dw_uleb128_t len = debug_line_data.GetULEB128(&offset); + dw_offset_t arg_size = len - (offset - ext_offset); + uint8_t sub_opcode = debug_line_data.GetU8(&offset); + // if (verbose) + // log->Printf( "Extended: <%u> %2.2x ", len, + // sub_opcode); + + switch (sub_opcode) { + case DW_LNE_end_sequence: + log->Printf("0x%8.8x: DW_LNE_end_sequence", op_offset); + row.Dump(log); + row.Reset(prologue.default_is_stmt); + break; + + case DW_LNE_set_address: { + row.address = debug_line_data.GetMaxU64(&offset, arg_size); + log->Printf("0x%8.8x: DW_LNE_set_address (0x%" PRIx64 ")", op_offset, + row.address); + } break; + + case DW_LNE_define_file: { + FileNameEntry fileEntry; + fileEntry.name = debug_line_data.GetCStr(&offset); + fileEntry.dir_idx = debug_line_data.GetULEB128(&offset); + fileEntry.mod_time = debug_line_data.GetULEB128(&offset); + fileEntry.length = debug_line_data.GetULEB128(&offset); + log->Printf("0x%8.8x: DW_LNE_define_file('%s', dir=%i, " + "mod_time=0x%8.8x, length=%i )", + op_offset, fileEntry.name, fileEntry.dir_idx, + fileEntry.mod_time, fileEntry.length); + prologue.file_names.push_back(fileEntry); + } break; + + case DW_LNE_set_discriminator: { + uint64_t discriminator = debug_line_data.GetULEB128(&offset); + log->Printf("0x%8.8x: DW_LNE_set_discriminator (0x%" PRIx64 ")", + op_offset, discriminator); + } break; + default: + log->Printf("0x%8.8x: DW_LNE_??? (%2.2x) - Skipping unknown upcode", + op_offset, opcode); + // Length doesn't include the zero opcode byte or the length itself, + // but + // it does include the sub_opcode, so we have to adjust for that below + offset += arg_size; + break; + } + } break; + + // Standard Opcodes + case DW_LNS_copy: + log->Printf("0x%8.8x: DW_LNS_copy", op_offset); + row.Dump(log); + break; + + case DW_LNS_advance_pc: { + dw_uleb128_t addr_offset_n = debug_line_data.GetULEB128(&offset); + dw_uleb128_t addr_offset = addr_offset_n * prologue.min_inst_length; + log->Printf("0x%8.8x: DW_LNS_advance_pc (0x%x)", op_offset, + addr_offset); + row.address += addr_offset; + } break; + + case DW_LNS_advance_line: { + dw_sleb128_t line_offset = debug_line_data.GetSLEB128(&offset); + log->Printf("0x%8.8x: DW_LNS_advance_line (%i)", op_offset, + line_offset); + row.line += line_offset; + } break; + + case DW_LNS_set_file: + row.file = debug_line_data.GetULEB128(&offset); + log->Printf("0x%8.8x: DW_LNS_set_file (%u)", op_offset, row.file); + break; + + case DW_LNS_set_column: + row.column = debug_line_data.GetULEB128(&offset); + log->Printf("0x%8.8x: DW_LNS_set_column (%u)", op_offset, row.column); + break; + + case DW_LNS_negate_stmt: + row.is_stmt = !row.is_stmt; + log->Printf("0x%8.8x: DW_LNS_negate_stmt", op_offset); + break; + + case DW_LNS_set_basic_block: + row.basic_block = true; + log->Printf("0x%8.8x: DW_LNS_set_basic_block", op_offset); + break; + + case DW_LNS_const_add_pc: { + uint8_t adjust_opcode = 255 - prologue.opcode_base; + dw_addr_t addr_offset = + (adjust_opcode / prologue.line_range) * prologue.min_inst_length; + log->Printf("0x%8.8x: DW_LNS_const_add_pc (0x%8.8" PRIx64 ")", + op_offset, addr_offset); + row.address += addr_offset; + } break; + + case DW_LNS_fixed_advance_pc: { + uint16_t pc_offset = debug_line_data.GetU16(&offset); + log->Printf("0x%8.8x: DW_LNS_fixed_advance_pc (0x%4.4x)", op_offset, + pc_offset); + row.address += pc_offset; + } break; + + case DW_LNS_set_prologue_end: + row.prologue_end = true; + log->Printf("0x%8.8x: DW_LNS_set_prologue_end", op_offset); + break; + + case DW_LNS_set_epilogue_begin: + row.epilogue_begin = true; + log->Printf("0x%8.8x: DW_LNS_set_epilogue_begin", op_offset); + break; + + case DW_LNS_set_isa: + row.isa = debug_line_data.GetULEB128(&offset); + log->Printf("0x%8.8x: DW_LNS_set_isa (%u)", op_offset, row.isa); + break; + + // Special Opcodes + default: + if (opcode < prologue.opcode_base) { + // We have an opcode that this parser doesn't know about, skip + // the number of ULEB128 numbers that is says to skip in the + // prologue's standard_opcode_lengths array + uint8_t n = prologue.standard_opcode_lengths[opcode - 1]; + log->Printf("0x%8.8x: Special : Unknown skipping %u ULEB128 values.", + op_offset, n); + while (n > 0) { + debug_line_data.GetULEB128(&offset); + --n; + } + } else { + uint8_t adjust_opcode = opcode - prologue.opcode_base; + dw_addr_t addr_offset = + (adjust_opcode / prologue.line_range) * prologue.min_inst_length; + int32_t line_offset = + prologue.line_base + (adjust_opcode % prologue.line_range); + log->Printf("0x%8.8x: address += 0x%" PRIx64 ", line += %i\n", + op_offset, (uint64_t)addr_offset, line_offset); + row.address += addr_offset; + row.line += line_offset; + row.Dump(log); } - return end_offset; + break; + } } - return DW_INVALID_OFFSET; + return end_offset; + } + return DW_INVALID_OFFSET; } - - - //---------------------------------------------------------------------- // Parse // @@ -391,120 +361,112 @@ DWARFDebugLine::DumpStatementOpcodes(Log *log, const DWARFDataExtractor& debug_l // new prologue is parsed and every time a new row is to be added to // the line table. //---------------------------------------------------------------------- -void -DWARFDebugLine::Parse(const DWARFDataExtractor& debug_line_data, DWARFDebugLine::State::Callback callback, void* userData) -{ - lldb::offset_t offset = 0; - if (debug_line_data.ValidOffset(offset)) - { - if (!ParseStatementTable(debug_line_data, &offset, callback, userData)) - ++offset; // Skip to next byte in .debug_line section - } +void DWARFDebugLine::Parse(const DWARFDataExtractor &debug_line_data, + DWARFDebugLine::State::Callback callback, + void *userData) { + lldb::offset_t offset = 0; + if (debug_line_data.ValidOffset(offset)) { + if (!ParseStatementTable(debug_line_data, &offset, callback, userData)) + ++offset; // Skip to next byte in .debug_line section + } } - //---------------------------------------------------------------------- // DWARFDebugLine::ParsePrologue //---------------------------------------------------------------------- -bool -DWARFDebugLine::ParsePrologue(const DWARFDataExtractor& debug_line_data, lldb::offset_t* offset_ptr, Prologue* prologue) -{ - const lldb::offset_t prologue_offset = *offset_ptr; - - //DEBUG_PRINTF("0x%8.8x: ParsePrologue()\n", *offset_ptr); - - prologue->Clear(); - uint32_t i; - const char * s; - prologue->total_length = debug_line_data.GetDWARFInitialLength(offset_ptr); - prologue->version = debug_line_data.GetU16(offset_ptr); - if (prologue->version < 2 || prologue->version > 4) - return false; - - prologue->prologue_length = debug_line_data.GetDWARFOffset(offset_ptr); - const lldb::offset_t end_prologue_offset = prologue->prologue_length + *offset_ptr; - prologue->min_inst_length = debug_line_data.GetU8(offset_ptr); - if (prologue->version >= 4) - prologue->maximum_operations_per_instruction = debug_line_data.GetU8(offset_ptr); - else - prologue->maximum_operations_per_instruction = 1; - prologue->default_is_stmt = debug_line_data.GetU8(offset_ptr); - prologue->line_base = debug_line_data.GetU8(offset_ptr); - prologue->line_range = debug_line_data.GetU8(offset_ptr); - prologue->opcode_base = debug_line_data.GetU8(offset_ptr); - - prologue->standard_opcode_lengths.reserve(prologue->opcode_base-1); - - for (i=1; i<prologue->opcode_base; ++i) - { - uint8_t op_len = debug_line_data.GetU8(offset_ptr); - prologue->standard_opcode_lengths.push_back(op_len); - } - - while (*offset_ptr < end_prologue_offset) - { - s = debug_line_data.GetCStr(offset_ptr); - if (s && s[0]) - prologue->include_directories.push_back(s); - else - break; - } - - while (*offset_ptr < end_prologue_offset) - { - const char* name = debug_line_data.GetCStr( offset_ptr ); - if (name && name[0]) - { - FileNameEntry fileEntry; - fileEntry.name = name; - fileEntry.dir_idx = debug_line_data.GetULEB128( offset_ptr ); - fileEntry.mod_time = debug_line_data.GetULEB128( offset_ptr ); - fileEntry.length = debug_line_data.GetULEB128( offset_ptr ); - prologue->file_names.push_back(fileEntry); - } - else - break; - } +bool DWARFDebugLine::ParsePrologue(const DWARFDataExtractor &debug_line_data, + lldb::offset_t *offset_ptr, + Prologue *prologue) { + const lldb::offset_t prologue_offset = *offset_ptr; + + // DEBUG_PRINTF("0x%8.8x: ParsePrologue()\n", *offset_ptr); + + prologue->Clear(); + uint32_t i; + const char *s; + prologue->total_length = debug_line_data.GetDWARFInitialLength(offset_ptr); + prologue->version = debug_line_data.GetU16(offset_ptr); + if (prologue->version < 2 || prologue->version > 4) + return false; - // XXX GNU as is broken for 64-Bit DWARF - if (*offset_ptr != end_prologue_offset) - { - Host::SystemLog (Host::eSystemLogWarning, - "warning: parsing line table prologue at 0x%8.8" PRIx64 " should have ended at 0x%8.8" PRIx64 " but it ended at 0x%8.8" PRIx64 "\n", - prologue_offset, - end_prologue_offset, - *offset_ptr); - } - return end_prologue_offset; + prologue->prologue_length = debug_line_data.GetDWARFOffset(offset_ptr); + const lldb::offset_t end_prologue_offset = + prologue->prologue_length + *offset_ptr; + prologue->min_inst_length = debug_line_data.GetU8(offset_ptr); + if (prologue->version >= 4) + prologue->maximum_operations_per_instruction = + debug_line_data.GetU8(offset_ptr); + else + prologue->maximum_operations_per_instruction = 1; + prologue->default_is_stmt = debug_line_data.GetU8(offset_ptr); + prologue->line_base = debug_line_data.GetU8(offset_ptr); + prologue->line_range = debug_line_data.GetU8(offset_ptr); + prologue->opcode_base = debug_line_data.GetU8(offset_ptr); + + prologue->standard_opcode_lengths.reserve(prologue->opcode_base - 1); + + for (i = 1; i < prologue->opcode_base; ++i) { + uint8_t op_len = debug_line_data.GetU8(offset_ptr); + prologue->standard_opcode_lengths.push_back(op_len); + } + + while (*offset_ptr < end_prologue_offset) { + s = debug_line_data.GetCStr(offset_ptr); + if (s && s[0]) + prologue->include_directories.push_back(s); + else + break; + } + + while (*offset_ptr < end_prologue_offset) { + const char *name = debug_line_data.GetCStr(offset_ptr); + if (name && name[0]) { + FileNameEntry fileEntry; + fileEntry.name = name; + fileEntry.dir_idx = debug_line_data.GetULEB128(offset_ptr); + fileEntry.mod_time = debug_line_data.GetULEB128(offset_ptr); + fileEntry.length = debug_line_data.GetULEB128(offset_ptr); + prologue->file_names.push_back(fileEntry); + } else + break; + } + + // XXX GNU as is broken for 64-Bit DWARF + if (*offset_ptr != end_prologue_offset) { + Host::SystemLog(Host::eSystemLogWarning, + "warning: parsing line table prologue at 0x%8.8" PRIx64 + " should have ended at 0x%8.8" PRIx64 + " but it ended at 0x%8.8" PRIx64 "\n", + prologue_offset, end_prologue_offset, *offset_ptr); + } + return end_prologue_offset; } -bool -DWARFDebugLine::ParseSupportFiles (const lldb::ModuleSP &module_sp, - const DWARFDataExtractor& debug_line_data, - const char *cu_comp_dir, - dw_offset_t stmt_list, - FileSpecList &support_files) -{ - lldb::offset_t offset = stmt_list; - - Prologue prologue; - if (!ParsePrologue(debug_line_data, &offset, &prologue)) - { - Host::SystemLog (Host::eSystemLogError, "error: parsing line table prologue at 0x%8.8x (parsing ended around 0x%8.8" PRIx64 "\n", stmt_list, offset); - return false; - } - - FileSpec file_spec; - std::string remapped_file; - - for (uint32_t file_idx = 1; prologue.GetFile(file_idx, cu_comp_dir, file_spec); ++file_idx) - { - if (module_sp->RemapSourceFile(file_spec.GetCString(), remapped_file)) - file_spec.SetFile(remapped_file, false); - support_files.Append(file_spec); - - } - return true; +bool DWARFDebugLine::ParseSupportFiles( + const lldb::ModuleSP &module_sp, const DWARFDataExtractor &debug_line_data, + const char *cu_comp_dir, dw_offset_t stmt_list, + FileSpecList &support_files) { + lldb::offset_t offset = stmt_list; + + Prologue prologue; + if (!ParsePrologue(debug_line_data, &offset, &prologue)) { + Host::SystemLog(Host::eSystemLogError, "error: parsing line table prologue " + "at 0x%8.8x (parsing ended around " + "0x%8.8" PRIx64 "\n", + stmt_list, offset); + return false; + } + + FileSpec file_spec; + std::string remapped_file; + + for (uint32_t file_idx = 1; + prologue.GetFile(file_idx, cu_comp_dir, file_spec); ++file_idx) { + if (module_sp->RemapSourceFile(file_spec.GetCString(), remapped_file)) + file_spec.SetFile(remapped_file, false); + support_files.Append(file_spec); + } + return true; } //---------------------------------------------------------------------- @@ -514,304 +476,294 @@ DWARFDebugLine::ParseSupportFiles (const lldb::ModuleSP &module_sp, // callback function once for the prologue (row in state will be zero) // and each time a row is to be added to the line table. //---------------------------------------------------------------------- -bool -DWARFDebugLine::ParseStatementTable -( - const DWARFDataExtractor& debug_line_data, - lldb::offset_t* offset_ptr, - DWARFDebugLine::State::Callback callback, - void* userData -) -{ - Log *log (LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_LINE)); - Prologue::shared_ptr prologue(new Prologue()); - - - const dw_offset_t debug_line_offset = *offset_ptr; - - Timer scoped_timer (LLVM_PRETTY_FUNCTION, - "DWARFDebugLine::ParseStatementTable (.debug_line[0x%8.8x])", - debug_line_offset); - - if (!ParsePrologue(debug_line_data, offset_ptr, prologue.get())) - { - if (log) - log->Error ("failed to parse DWARF line table prologue"); - // Restore our offset and return false to indicate failure! - *offset_ptr = debug_line_offset; - return false; - } +bool DWARFDebugLine::ParseStatementTable( + const DWARFDataExtractor &debug_line_data, lldb::offset_t *offset_ptr, + DWARFDebugLine::State::Callback callback, void *userData) { + Log *log(LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_LINE)); + Prologue::shared_ptr prologue(new Prologue()); - if (log) - prologue->Dump (log); + const dw_offset_t debug_line_offset = *offset_ptr; - const dw_offset_t end_offset = debug_line_offset + prologue->total_length + (debug_line_data.GetDWARFSizeofInitialLength()); + Timer scoped_timer( + LLVM_PRETTY_FUNCTION, + "DWARFDebugLine::ParseStatementTable (.debug_line[0x%8.8x])", + debug_line_offset); - State state(prologue, log, callback, userData); - - while (*offset_ptr < end_offset) - { - //DEBUG_PRINTF("0x%8.8x: ", *offset_ptr); - uint8_t opcode = debug_line_data.GetU8(offset_ptr); - - if (opcode == 0) + if (!ParsePrologue(debug_line_data, offset_ptr, prologue.get())) { + if (log) + log->Error("failed to parse DWARF line table prologue"); + // Restore our offset and return false to indicate failure! + *offset_ptr = debug_line_offset; + return false; + } + + if (log) + prologue->Dump(log); + + const dw_offset_t end_offset = + debug_line_offset + prologue->total_length + + (debug_line_data.GetDWARFSizeofInitialLength()); + + State state(prologue, log, callback, userData); + + while (*offset_ptr < end_offset) { + // DEBUG_PRINTF("0x%8.8x: ", *offset_ptr); + uint8_t opcode = debug_line_data.GetU8(offset_ptr); + + if (opcode == 0) { + // Extended Opcodes always start with a zero opcode followed by + // a uleb128 length so you can skip ones you don't know about + lldb::offset_t ext_offset = *offset_ptr; + dw_uleb128_t len = debug_line_data.GetULEB128(offset_ptr); + dw_offset_t arg_size = len - (*offset_ptr - ext_offset); + + // DEBUG_PRINTF("Extended: <%2u> ", len); + uint8_t sub_opcode = debug_line_data.GetU8(offset_ptr); + switch (sub_opcode) { + case DW_LNE_end_sequence: + // Set the end_sequence register of the state machine to true and + // append a row to the matrix using the current values of the + // state-machine registers. Then reset the registers to the initial + // values specified above. Every statement program sequence must end + // with a DW_LNE_end_sequence instruction which creates a row whose + // address is that of the byte after the last target machine instruction + // of the sequence. + state.end_sequence = true; + state.AppendRowToMatrix(*offset_ptr); + state.Reset(); + break; + + case DW_LNE_set_address: + // Takes a single relocatable address as an operand. The size of the + // operand is the size appropriate to hold an address on the target + // machine. Set the address register to the value given by the + // relocatable address. All of the other statement program opcodes + // that affect the address register add a delta to it. This instruction + // stores a relocatable value into it instead. + if (arg_size == 4) + state.address = debug_line_data.GetU32(offset_ptr); + else // arg_size == 8 + state.address = debug_line_data.GetU64(offset_ptr); + break; + + case DW_LNE_define_file: + // Takes 4 arguments. The first is a null terminated string containing + // a source file name. The second is an unsigned LEB128 number + // representing + // the directory index of the directory in which the file was found. The + // third is an unsigned LEB128 number representing the time of last + // modification of the file. The fourth is an unsigned LEB128 number + // representing the length in bytes of the file. The time and length + // fields may contain LEB128(0) if the information is not available. + // + // The directory index represents an entry in the include_directories + // section of the statement program prologue. The index is LEB128(0) + // if the file was found in the current directory of the compilation, + // LEB128(1) if it was found in the first directory in the + // include_directories section, and so on. The directory index is + // ignored for file names that represent full path names. + // + // The files are numbered, starting at 1, in the order in which they + // appear; the names in the prologue come before names defined by + // the DW_LNE_define_file instruction. These numbers are used in the + // file register of the state machine. { - // Extended Opcodes always start with a zero opcode followed by - // a uleb128 length so you can skip ones you don't know about - lldb::offset_t ext_offset = *offset_ptr; - dw_uleb128_t len = debug_line_data.GetULEB128(offset_ptr); - dw_offset_t arg_size = len - (*offset_ptr - ext_offset); - - //DEBUG_PRINTF("Extended: <%2u> ", len); - uint8_t sub_opcode = debug_line_data.GetU8(offset_ptr); - switch (sub_opcode) - { - case DW_LNE_end_sequence: - // Set the end_sequence register of the state machine to true and - // append a row to the matrix using the current values of the - // state-machine registers. Then reset the registers to the initial - // values specified above. Every statement program sequence must end - // with a DW_LNE_end_sequence instruction which creates a row whose - // address is that of the byte after the last target machine instruction - // of the sequence. - state.end_sequence = true; - state.AppendRowToMatrix(*offset_ptr); - state.Reset(); - break; - - case DW_LNE_set_address: - // Takes a single relocatable address as an operand. The size of the - // operand is the size appropriate to hold an address on the target - // machine. Set the address register to the value given by the - // relocatable address. All of the other statement program opcodes - // that affect the address register add a delta to it. This instruction - // stores a relocatable value into it instead. - if (arg_size == 4) - state.address = debug_line_data.GetU32(offset_ptr); - else // arg_size == 8 - state.address = debug_line_data.GetU64(offset_ptr); - break; - - case DW_LNE_define_file: - // Takes 4 arguments. The first is a null terminated string containing - // a source file name. The second is an unsigned LEB128 number representing - // the directory index of the directory in which the file was found. The - // third is an unsigned LEB128 number representing the time of last - // modification of the file. The fourth is an unsigned LEB128 number - // representing the length in bytes of the file. The time and length - // fields may contain LEB128(0) if the information is not available. - // - // The directory index represents an entry in the include_directories - // section of the statement program prologue. The index is LEB128(0) - // if the file was found in the current directory of the compilation, - // LEB128(1) if it was found in the first directory in the - // include_directories section, and so on. The directory index is - // ignored for file names that represent full path names. - // - // The files are numbered, starting at 1, in the order in which they - // appear; the names in the prologue come before names defined by - // the DW_LNE_define_file instruction. These numbers are used in the - // file register of the state machine. - { - FileNameEntry fileEntry; - fileEntry.name = debug_line_data.GetCStr(offset_ptr); - fileEntry.dir_idx = debug_line_data.GetULEB128(offset_ptr); - fileEntry.mod_time = debug_line_data.GetULEB128(offset_ptr); - fileEntry.length = debug_line_data.GetULEB128(offset_ptr); - state.prologue->file_names.push_back(fileEntry); - } - break; - - default: - // Length doesn't include the zero opcode byte or the length itself, but - // it does include the sub_opcode, so we have to adjust for that below - (*offset_ptr) += arg_size; - break; - } + FileNameEntry fileEntry; + fileEntry.name = debug_line_data.GetCStr(offset_ptr); + fileEntry.dir_idx = debug_line_data.GetULEB128(offset_ptr); + fileEntry.mod_time = debug_line_data.GetULEB128(offset_ptr); + fileEntry.length = debug_line_data.GetULEB128(offset_ptr); + state.prologue->file_names.push_back(fileEntry); } - else if (opcode < prologue->opcode_base) + break; + + default: + // Length doesn't include the zero opcode byte or the length itself, but + // it does include the sub_opcode, so we have to adjust for that below + (*offset_ptr) += arg_size; + break; + } + } else if (opcode < prologue->opcode_base) { + switch (opcode) { + // Standard Opcodes + case DW_LNS_copy: + // Takes no arguments. Append a row to the matrix using the + // current values of the state-machine registers. Then set + // the basic_block register to false. + state.AppendRowToMatrix(*offset_ptr); + break; + + case DW_LNS_advance_pc: + // Takes a single unsigned LEB128 operand, multiplies it by the + // min_inst_length field of the prologue, and adds the + // result to the address register of the state machine. + state.address += + debug_line_data.GetULEB128(offset_ptr) * prologue->min_inst_length; + break; + + case DW_LNS_advance_line: + // Takes a single signed LEB128 operand and adds that value to + // the line register of the state machine. + state.line += debug_line_data.GetSLEB128(offset_ptr); + break; + + case DW_LNS_set_file: + // Takes a single unsigned LEB128 operand and stores it in the file + // register of the state machine. + state.file = debug_line_data.GetULEB128(offset_ptr); + break; + + case DW_LNS_set_column: + // Takes a single unsigned LEB128 operand and stores it in the + // column register of the state machine. + state.column = debug_line_data.GetULEB128(offset_ptr); + break; + + case DW_LNS_negate_stmt: + // Takes no arguments. Set the is_stmt register of the state + // machine to the logical negation of its current value. + state.is_stmt = !state.is_stmt; + break; + + case DW_LNS_set_basic_block: + // Takes no arguments. Set the basic_block register of the + // state machine to true + state.basic_block = true; + break; + + case DW_LNS_const_add_pc: + // Takes no arguments. Add to the address register of the state + // machine the address increment value corresponding to special + // opcode 255. The motivation for DW_LNS_const_add_pc is this: + // when the statement program needs to advance the address by a + // small amount, it can use a single special opcode, which occupies + // a single byte. When it needs to advance the address by up to + // twice the range of the last special opcode, it can use + // DW_LNS_const_add_pc followed by a special opcode, for a total + // of two bytes. Only if it needs to advance the address by more + // than twice that range will it need to use both DW_LNS_advance_pc + // and a special opcode, requiring three or more bytes. { - switch (opcode) - { - // Standard Opcodes - case DW_LNS_copy: - // Takes no arguments. Append a row to the matrix using the - // current values of the state-machine registers. Then set - // the basic_block register to false. - state.AppendRowToMatrix(*offset_ptr); - break; - - case DW_LNS_advance_pc: - // Takes a single unsigned LEB128 operand, multiplies it by the - // min_inst_length field of the prologue, and adds the - // result to the address register of the state machine. - state.address += debug_line_data.GetULEB128(offset_ptr) * prologue->min_inst_length; - break; - - case DW_LNS_advance_line: - // Takes a single signed LEB128 operand and adds that value to - // the line register of the state machine. - state.line += debug_line_data.GetSLEB128(offset_ptr); - break; - - case DW_LNS_set_file: - // Takes a single unsigned LEB128 operand and stores it in the file - // register of the state machine. - state.file = debug_line_data.GetULEB128(offset_ptr); - break; - - case DW_LNS_set_column: - // Takes a single unsigned LEB128 operand and stores it in the - // column register of the state machine. - state.column = debug_line_data.GetULEB128(offset_ptr); - break; - - case DW_LNS_negate_stmt: - // Takes no arguments. Set the is_stmt register of the state - // machine to the logical negation of its current value. - state.is_stmt = !state.is_stmt; - break; - - case DW_LNS_set_basic_block: - // Takes no arguments. Set the basic_block register of the - // state machine to true - state.basic_block = true; - break; - - case DW_LNS_const_add_pc: - // Takes no arguments. Add to the address register of the state - // machine the address increment value corresponding to special - // opcode 255. The motivation for DW_LNS_const_add_pc is this: - // when the statement program needs to advance the address by a - // small amount, it can use a single special opcode, which occupies - // a single byte. When it needs to advance the address by up to - // twice the range of the last special opcode, it can use - // DW_LNS_const_add_pc followed by a special opcode, for a total - // of two bytes. Only if it needs to advance the address by more - // than twice that range will it need to use both DW_LNS_advance_pc - // and a special opcode, requiring three or more bytes. - { - uint8_t adjust_opcode = 255 - prologue->opcode_base; - dw_addr_t addr_offset = (adjust_opcode / prologue->line_range) * prologue->min_inst_length; - state.address += addr_offset; - } - break; - - case DW_LNS_fixed_advance_pc: - // Takes a single uhalf operand. Add to the address register of - // the state machine the value of the (unencoded) operand. This - // is the only extended opcode that takes an argument that is not - // a variable length number. The motivation for DW_LNS_fixed_advance_pc - // is this: existing assemblers cannot emit DW_LNS_advance_pc or - // special opcodes because they cannot encode LEB128 numbers or - // judge when the computation of a special opcode overflows and - // requires the use of DW_LNS_advance_pc. Such assemblers, however, - // can use DW_LNS_fixed_advance_pc instead, sacrificing compression. - state.address += debug_line_data.GetU16(offset_ptr); - break; - - case DW_LNS_set_prologue_end: - // Takes no arguments. Set the prologue_end register of the - // state machine to true - state.prologue_end = true; - break; - - case DW_LNS_set_epilogue_begin: - // Takes no arguments. Set the basic_block register of the - // state machine to true - state.epilogue_begin = true; - break; - - case DW_LNS_set_isa: - // Takes a single unsigned LEB128 operand and stores it in the - // column register of the state machine. - state.isa = debug_line_data.GetULEB128(offset_ptr); - break; - - default: - // Handle any unknown standard opcodes here. We know the lengths - // of such opcodes because they are specified in the prologue - // as a multiple of LEB128 operands for each opcode. - { - uint8_t i; - assert (static_cast<size_t>(opcode - 1) < prologue->standard_opcode_lengths.size()); - const uint8_t opcode_length = prologue->standard_opcode_lengths[opcode - 1]; - for (i=0; i<opcode_length; ++i) - debug_line_data.Skip_LEB128(offset_ptr); - } - break; - } + uint8_t adjust_opcode = 255 - prologue->opcode_base; + dw_addr_t addr_offset = (adjust_opcode / prologue->line_range) * + prologue->min_inst_length; + state.address += addr_offset; } - else + break; + + case DW_LNS_fixed_advance_pc: + // Takes a single uhalf operand. Add to the address register of + // the state machine the value of the (unencoded) operand. This + // is the only extended opcode that takes an argument that is not + // a variable length number. The motivation for DW_LNS_fixed_advance_pc + // is this: existing assemblers cannot emit DW_LNS_advance_pc or + // special opcodes because they cannot encode LEB128 numbers or + // judge when the computation of a special opcode overflows and + // requires the use of DW_LNS_advance_pc. Such assemblers, however, + // can use DW_LNS_fixed_advance_pc instead, sacrificing compression. + state.address += debug_line_data.GetU16(offset_ptr); + break; + + case DW_LNS_set_prologue_end: + // Takes no arguments. Set the prologue_end register of the + // state machine to true + state.prologue_end = true; + break; + + case DW_LNS_set_epilogue_begin: + // Takes no arguments. Set the basic_block register of the + // state machine to true + state.epilogue_begin = true; + break; + + case DW_LNS_set_isa: + // Takes a single unsigned LEB128 operand and stores it in the + // column register of the state machine. + state.isa = debug_line_data.GetULEB128(offset_ptr); + break; + + default: + // Handle any unknown standard opcodes here. We know the lengths + // of such opcodes because they are specified in the prologue + // as a multiple of LEB128 operands for each opcode. { - // Special Opcodes - - // A special opcode value is chosen based on the amount that needs - // to be added to the line and address registers. The maximum line - // increment for a special opcode is the value of the line_base - // field in the header, plus the value of the line_range field, - // minus 1 (line base + line range - 1). If the desired line - // increment is greater than the maximum line increment, a standard - // opcode must be used instead of a special opcode. The "address - // advance" is calculated by dividing the desired address increment - // by the minimum_instruction_length field from the header. The - // special opcode is then calculated using the following formula: - // - // opcode = (desired line increment - line_base) + (line_range * address advance) + opcode_base - // - // If the resulting opcode is greater than 255, a standard opcode - // must be used instead. - // - // To decode a special opcode, subtract the opcode_base from the - // opcode itself to give the adjusted opcode. The amount to - // increment the address register is the result of the adjusted - // opcode divided by the line_range multiplied by the - // minimum_instruction_length field from the header. That is: - // - // address increment = (adjusted opcode / line_range) * minimum_instruction_length - // - // The amount to increment the line register is the line_base plus - // the result of the adjusted opcode modulo the line_range. That is: - // - // line increment = line_base + (adjusted opcode % line_range) - - uint8_t adjust_opcode = opcode - prologue->opcode_base; - dw_addr_t addr_offset = (adjust_opcode / prologue->line_range) * prologue->min_inst_length; - int32_t line_offset = prologue->line_base + (adjust_opcode % prologue->line_range); - state.line += line_offset; - state.address += addr_offset; - state.AppendRowToMatrix(*offset_ptr); + uint8_t i; + assert(static_cast<size_t>(opcode - 1) < + prologue->standard_opcode_lengths.size()); + const uint8_t opcode_length = + prologue->standard_opcode_lengths[opcode - 1]; + for (i = 0; i < opcode_length; ++i) + debug_line_data.Skip_LEB128(offset_ptr); } + break; + } + } else { + // Special Opcodes + + // A special opcode value is chosen based on the amount that needs + // to be added to the line and address registers. The maximum line + // increment for a special opcode is the value of the line_base + // field in the header, plus the value of the line_range field, + // minus 1 (line base + line range - 1). If the desired line + // increment is greater than the maximum line increment, a standard + // opcode must be used instead of a special opcode. The "address + // advance" is calculated by dividing the desired address increment + // by the minimum_instruction_length field from the header. The + // special opcode is then calculated using the following formula: + // + // opcode = (desired line increment - line_base) + (line_range * address + // advance) + opcode_base + // + // If the resulting opcode is greater than 255, a standard opcode + // must be used instead. + // + // To decode a special opcode, subtract the opcode_base from the + // opcode itself to give the adjusted opcode. The amount to + // increment the address register is the result of the adjusted + // opcode divided by the line_range multiplied by the + // minimum_instruction_length field from the header. That is: + // + // address increment = (adjusted opcode / line_range) * + // minimum_instruction_length + // + // The amount to increment the line register is the line_base plus + // the result of the adjusted opcode modulo the line_range. That is: + // + // line increment = line_base + (adjusted opcode % line_range) + + uint8_t adjust_opcode = opcode - prologue->opcode_base; + dw_addr_t addr_offset = + (adjust_opcode / prologue->line_range) * prologue->min_inst_length; + int32_t line_offset = + prologue->line_base + (adjust_opcode % prologue->line_range); + state.line += line_offset; + state.address += addr_offset; + state.AppendRowToMatrix(*offset_ptr); } + } - state.Finalize( *offset_ptr ); + state.Finalize(*offset_ptr); - return end_offset; + return end_offset; } - //---------------------------------------------------------------------- // ParseStatementTableCallback //---------------------------------------------------------------------- -static void -ParseStatementTableCallback(dw_offset_t offset, const DWARFDebugLine::State& state, void* userData) -{ - DWARFDebugLine::LineTable* line_table = (DWARFDebugLine::LineTable*)userData; - if (state.row == DWARFDebugLine::State::StartParsingLineTable) - { - // Just started parsing the line table, so lets keep a reference to - // the prologue using the supplied shared pointer - line_table->prologue = state.prologue; - } - else if (state.row == DWARFDebugLine::State::DoneParsingLineTable) - { - // Done parsing line table, nothing to do for the cleanup - } - else - { - // We have a new row, lets append it - line_table->AppendRow(state); - } +static void ParseStatementTableCallback(dw_offset_t offset, + const DWARFDebugLine::State &state, + void *userData) { + DWARFDebugLine::LineTable *line_table = (DWARFDebugLine::LineTable *)userData; + if (state.row == DWARFDebugLine::State::StartParsingLineTable) { + // Just started parsing the line table, so lets keep a reference to + // the prologue using the supplied shared pointer + line_table->prologue = state.prologue; + } else if (state.row == DWARFDebugLine::State::DoneParsingLineTable) { + // Done parsing line table, nothing to do for the cleanup + } else { + // We have a new row, lets append it + line_table->AppendRow(state); + } } //---------------------------------------------------------------------- @@ -820,75 +772,65 @@ ParseStatementTableCallback(dw_offset_t offset, const DWARFDebugLine::State& sta // Parse a line table at offset and populate the LineTable class with // the prologue and all rows. //---------------------------------------------------------------------- -bool -DWARFDebugLine::ParseStatementTable(const DWARFDataExtractor& debug_line_data, lldb::offset_t *offset_ptr, LineTable* line_table) -{ - return ParseStatementTable(debug_line_data, offset_ptr, ParseStatementTableCallback, line_table); +bool DWARFDebugLine::ParseStatementTable( + const DWARFDataExtractor &debug_line_data, lldb::offset_t *offset_ptr, + LineTable *line_table) { + return ParseStatementTable(debug_line_data, offset_ptr, + ParseStatementTableCallback, line_table); } - -inline bool -DWARFDebugLine::Prologue::IsValid() const -{ - return SymbolFileDWARF::SupportedVersion(version); +inline bool DWARFDebugLine::Prologue::IsValid() const { + return SymbolFileDWARF::SupportedVersion(version); } //---------------------------------------------------------------------- // DWARFDebugLine::Prologue::Dump //---------------------------------------------------------------------- -void -DWARFDebugLine::Prologue::Dump(Log *log) -{ - uint32_t i; - - log->Printf( "Line table prologue:"); - log->Printf( " total_length: 0x%8.8x", total_length); - log->Printf( " version: %u", version); - log->Printf( "prologue_length: 0x%8.8x", prologue_length); - log->Printf( "min_inst_length: %u", min_inst_length); - log->Printf( "default_is_stmt: %u", default_is_stmt); - log->Printf( " line_base: %i", line_base); - log->Printf( " line_range: %u", line_range); - log->Printf( " opcode_base: %u", opcode_base); - - for (i=0; i<standard_opcode_lengths.size(); ++i) - { - log->Printf( "standard_opcode_lengths[%s] = %u", DW_LNS_value_to_name(i+1), standard_opcode_lengths[i]); +void DWARFDebugLine::Prologue::Dump(Log *log) { + uint32_t i; + + log->Printf("Line table prologue:"); + log->Printf(" total_length: 0x%8.8x", total_length); + log->Printf(" version: %u", version); + log->Printf("prologue_length: 0x%8.8x", prologue_length); + log->Printf("min_inst_length: %u", min_inst_length); + log->Printf("default_is_stmt: %u", default_is_stmt); + log->Printf(" line_base: %i", line_base); + log->Printf(" line_range: %u", line_range); + log->Printf(" opcode_base: %u", opcode_base); + + for (i = 0; i < standard_opcode_lengths.size(); ++i) { + log->Printf("standard_opcode_lengths[%s] = %u", DW_LNS_value_to_name(i + 1), + standard_opcode_lengths[i]); + } + + if (!include_directories.empty()) { + for (i = 0; i < include_directories.size(); ++i) { + log->Printf("include_directories[%3u] = '%s'", i + 1, + include_directories[i]); } - - if (!include_directories.empty()) - { - for (i=0; i<include_directories.size(); ++i) - { - log->Printf( "include_directories[%3u] = '%s'", i+1, include_directories[i]); - } - } - - if (!file_names.empty()) - { - log->PutCString (" Dir Mod Time File Len File Name"); - log->PutCString (" ---- ---------- ---------- ---------------------------"); - for (i=0; i<file_names.size(); ++i) - { - const FileNameEntry& fileEntry = file_names[i]; - log->Printf ("file_names[%3u] %4u 0x%8.8x 0x%8.8x %s", - i+1, - fileEntry.dir_idx, - fileEntry.mod_time, - fileEntry.length, - fileEntry.name); - } + } + + if (!file_names.empty()) { + log->PutCString(" Dir Mod Time File Len File Name"); + log->PutCString(" ---- ---------- ---------- " + "---------------------------"); + for (i = 0; i < file_names.size(); ++i) { + const FileNameEntry &fileEntry = file_names[i]; + log->Printf("file_names[%3u] %4u 0x%8.8x 0x%8.8x %s", i + 1, + fileEntry.dir_idx, fileEntry.mod_time, fileEntry.length, + fileEntry.name); } + } } - //---------------------------------------------------------------------- // DWARFDebugLine::ParsePrologue::Append // // Append the contents of the prologue to the binary stream buffer //---------------------------------------------------------------------- -//void -//DWARFDebugLine::Prologue::Append(BinaryStreamBuf& buff) const +// void +// DWARFDebugLine::Prologue::Append(BinaryStreamBuf& buff) const //{ // uint32_t i; // @@ -906,7 +848,8 @@ DWARFDebugLine::Prologue::Dump(Log *log) // // for (i=0; i<include_directories.size(); ++i) // buff.AppendCStr(include_directories[i].c_str()); -// buff.Append8(0); // Terminate the include directory section with empty string +// buff.Append8(0); // Terminate the include directory section with empty +// string // // for (i=0; i<file_names.size(); ++i) // { @@ -918,307 +861,242 @@ DWARFDebugLine::Prologue::Dump(Log *log) // buff.Append8(0); // Terminate the file names section with empty string //} - -bool DWARFDebugLine::Prologue::GetFile(uint32_t file_idx, const char *comp_dir, FileSpec &file) const -{ - uint32_t idx = file_idx - 1; // File indexes are 1 based... - if (idx < file_names.size()) - { - file.SetFile(file_names[idx].name, false); - if (file.IsRelative()) - { - if (file_names[idx].dir_idx > 0) - { - const uint32_t dir_idx = file_names[idx].dir_idx - 1; - if (dir_idx < include_directories.size()) - { - file.PrependPathComponent(include_directories[dir_idx]); - if (!file.IsRelative()) - return true; - } - } - - if (comp_dir && comp_dir[0]) - file.PrependPathComponent(comp_dir); +bool DWARFDebugLine::Prologue::GetFile(uint32_t file_idx, const char *comp_dir, + FileSpec &file) const { + uint32_t idx = file_idx - 1; // File indexes are 1 based... + if (idx < file_names.size()) { + file.SetFile(file_names[idx].name, false); + if (file.IsRelative()) { + if (file_names[idx].dir_idx > 0) { + const uint32_t dir_idx = file_names[idx].dir_idx - 1; + if (dir_idx < include_directories.size()) { + file.PrependPathComponent(include_directories[dir_idx]); + if (!file.IsRelative()) + return true; } - return true; + } + + if (comp_dir && comp_dir[0]) + file.PrependPathComponent(comp_dir); } - return false; + return true; + } + return false; } //---------------------------------------------------------------------- // DWARFDebugLine::LineTable::Dump //---------------------------------------------------------------------- -void -DWARFDebugLine::LineTable::Dump(Log *log) const -{ - if (prologue.get()) - prologue->Dump (log); - - if (!rows.empty()) - { - log->PutCString ("Address Line Column File ISA Flags"); - log->PutCString ("------------------ ------ ------ ------ --- -------------"); - Row::const_iterator pos = rows.begin(); - Row::const_iterator end = rows.end(); - while (pos != end) - { - (*pos).Dump (log); - ++pos; - } +void DWARFDebugLine::LineTable::Dump(Log *log) const { + if (prologue.get()) + prologue->Dump(log); + + if (!rows.empty()) { + log->PutCString("Address Line Column File ISA Flags"); + log->PutCString( + "------------------ ------ ------ ------ --- -------------"); + Row::const_iterator pos = rows.begin(); + Row::const_iterator end = rows.end(); + while (pos != end) { + (*pos).Dump(log); + ++pos; } + } } - -void -DWARFDebugLine::LineTable::AppendRow(const DWARFDebugLine::Row& state) -{ - rows.push_back(state); +void DWARFDebugLine::LineTable::AppendRow(const DWARFDebugLine::Row &state) { + rows.push_back(state); } - - //---------------------------------------------------------------------- -// Compare function for the binary search in DWARFDebugLine::LineTable::LookupAddress() +// Compare function for the binary search in +// DWARFDebugLine::LineTable::LookupAddress() //---------------------------------------------------------------------- -static bool FindMatchingAddress (const DWARFDebugLine::Row& row1, const DWARFDebugLine::Row& row2) -{ - return row1.address < row2.address; +static bool FindMatchingAddress(const DWARFDebugLine::Row &row1, + const DWARFDebugLine::Row &row2) { + return row1.address < row2.address; } - //---------------------------------------------------------------------- // DWARFDebugLine::LineTable::LookupAddress //---------------------------------------------------------------------- -uint32_t -DWARFDebugLine::LineTable::LookupAddress(dw_addr_t address, dw_addr_t cu_high_pc) const -{ - uint32_t index = UINT32_MAX; - if (!rows.empty()) - { - // Use the lower_bound algorithm to perform a binary search since we know - // that our line table data is ordered by address. - DWARFDebugLine::Row row; - row.address = address; - Row::const_iterator begin_pos = rows.begin(); - Row::const_iterator end_pos = rows.end(); - Row::const_iterator pos = lower_bound(begin_pos, end_pos, row, FindMatchingAddress); - if (pos == end_pos) - { - if (address < cu_high_pc) - return rows.size()-1; - } +uint32_t DWARFDebugLine::LineTable::LookupAddress(dw_addr_t address, + dw_addr_t cu_high_pc) const { + uint32_t index = UINT32_MAX; + if (!rows.empty()) { + // Use the lower_bound algorithm to perform a binary search since we know + // that our line table data is ordered by address. + DWARFDebugLine::Row row; + row.address = address; + Row::const_iterator begin_pos = rows.begin(); + Row::const_iterator end_pos = rows.end(); + Row::const_iterator pos = + lower_bound(begin_pos, end_pos, row, FindMatchingAddress); + if (pos == end_pos) { + if (address < cu_high_pc) + return rows.size() - 1; + } else { + // Rely on fact that we are using a std::vector and we can do + // pointer arithmetic to find the row index (which will be one less + // that what we found since it will find the first position after + // the current address) since std::vector iterators are just + // pointers to the container type. + index = pos - begin_pos; + if (pos->address > address) { + if (index > 0) + --index; else - { - // Rely on fact that we are using a std::vector and we can do - // pointer arithmetic to find the row index (which will be one less - // that what we found since it will find the first position after - // the current address) since std::vector iterators are just - // pointers to the container type. - index = pos - begin_pos; - if (pos->address > address) - { - if (index > 0) - --index; - else - index = UINT32_MAX; - } - } + index = UINT32_MAX; + } } - return index; // Failed to find address + } + return index; // Failed to find address } - //---------------------------------------------------------------------- // DWARFDebugLine::Row::Row //---------------------------------------------------------------------- -DWARFDebugLine::Row::Row(bool default_is_stmt) : - address(0), - line(1), - column(0), - file(1), - is_stmt(default_is_stmt), - basic_block(false), - end_sequence(false), - prologue_end(false), - epilogue_begin(false), - isa(0) -{ -} +DWARFDebugLine::Row::Row(bool default_is_stmt) + : address(0), line(1), column(0), file(1), is_stmt(default_is_stmt), + basic_block(false), end_sequence(false), prologue_end(false), + epilogue_begin(false), isa(0) {} //---------------------------------------------------------------------- // Called after a row is appended to the matrix //---------------------------------------------------------------------- -void -DWARFDebugLine::Row::PostAppend() -{ - basic_block = false; - prologue_end = false; - epilogue_begin = false; +void DWARFDebugLine::Row::PostAppend() { + basic_block = false; + prologue_end = false; + epilogue_begin = false; } - //---------------------------------------------------------------------- // DWARFDebugLine::Row::Reset //---------------------------------------------------------------------- -void -DWARFDebugLine::Row::Reset(bool default_is_stmt) -{ - address = 0; - line = 1; - column = 0; - file = 1; - is_stmt = default_is_stmt; - basic_block = false; - end_sequence = false; - prologue_end = false; - epilogue_begin = false; - isa = 0; +void DWARFDebugLine::Row::Reset(bool default_is_stmt) { + address = 0; + line = 1; + column = 0; + file = 1; + is_stmt = default_is_stmt; + basic_block = false; + end_sequence = false; + prologue_end = false; + epilogue_begin = false; + isa = 0; } //---------------------------------------------------------------------- // DWARFDebugLine::Row::Dump //---------------------------------------------------------------------- -void -DWARFDebugLine::Row::Dump(Log *log) const -{ - log->Printf( "0x%16.16" PRIx64 " %6u %6u %6u %3u %s%s%s%s%s", - address, - line, - column, - file, - isa, - is_stmt ? " is_stmt" : "", - basic_block ? " basic_block" : "", - prologue_end ? " prologue_end" : "", - epilogue_begin ? " epilogue_begin" : "", - end_sequence ? " end_sequence" : ""); +void DWARFDebugLine::Row::Dump(Log *log) const { + log->Printf("0x%16.16" PRIx64 " %6u %6u %6u %3u %s%s%s%s%s", address, line, + column, file, isa, is_stmt ? " is_stmt" : "", + basic_block ? " basic_block" : "", + prologue_end ? " prologue_end" : "", + epilogue_begin ? " epilogue_begin" : "", + end_sequence ? " end_sequence" : ""); } //---------------------------------------------------------------------- // Compare function LineTable structures //---------------------------------------------------------------------- -static bool AddressLessThan (const DWARFDebugLine::Row& a, const DWARFDebugLine::Row& b) -{ - return a.address < b.address; +static bool AddressLessThan(const DWARFDebugLine::Row &a, + const DWARFDebugLine::Row &b) { + return a.address < b.address; } - - // Insert a row at the correct address if the addresses can be out of // order which can only happen when we are linking a line table that // may have had it's contents rearranged. -void -DWARFDebugLine::Row::Insert(Row::collection& state_coll, const Row& state) -{ - // If we don't have anything yet, or if the address of the last state in our - // line table is less than the current one, just append the current state - if (state_coll.empty() || AddressLessThan(state_coll.back(), state)) - { - state_coll.push_back(state); - } - else - { - // Do a binary search for the correct entry - pair<Row::iterator, Row::iterator> range(equal_range(state_coll.begin(), state_coll.end(), state, AddressLessThan)); - - // If the addresses are equal, we can safely replace the previous entry - // with the current one if the one it is replacing is an end_sequence entry. - // We currently always place an extra end sequence when ever we exit a valid - // address range for a function in case the functions get rearranged by - // optimizations or by order specifications. These extra end sequences will - // disappear by getting replaced with valid consecutive entries within a - // compile unit if there are no gaps. - if (range.first == range.second) - { - state_coll.insert(range.first, state); - } - else - { - if ((distance(range.first, range.second) == 1) && range.first->end_sequence == true) - { - *range.first = state; - } - else - { - state_coll.insert(range.second, state); - } - } +void DWARFDebugLine::Row::Insert(Row::collection &state_coll, + const Row &state) { + // If we don't have anything yet, or if the address of the last state in our + // line table is less than the current one, just append the current state + if (state_coll.empty() || AddressLessThan(state_coll.back(), state)) { + state_coll.push_back(state); + } else { + // Do a binary search for the correct entry + pair<Row::iterator, Row::iterator> range(equal_range( + state_coll.begin(), state_coll.end(), state, AddressLessThan)); + + // If the addresses are equal, we can safely replace the previous entry + // with the current one if the one it is replacing is an end_sequence entry. + // We currently always place an extra end sequence when ever we exit a valid + // address range for a function in case the functions get rearranged by + // optimizations or by order specifications. These extra end sequences will + // disappear by getting replaced with valid consecutive entries within a + // compile unit if there are no gaps. + if (range.first == range.second) { + state_coll.insert(range.first, state); + } else { + if ((distance(range.first, range.second) == 1) && + range.first->end_sequence == true) { + *range.first = state; + } else { + state_coll.insert(range.second, state); + } } + } } -void -DWARFDebugLine::Row::Dump(Log *log, const Row::collection& state_coll) -{ - std::for_each (state_coll.begin(), state_coll.end(), bind2nd(std::mem_fun_ref(&Row::Dump),log)); +void DWARFDebugLine::Row::Dump(Log *log, const Row::collection &state_coll) { + std::for_each(state_coll.begin(), state_coll.end(), + bind2nd(std::mem_fun_ref(&Row::Dump), log)); } - //---------------------------------------------------------------------- // DWARFDebugLine::State::State //---------------------------------------------------------------------- -DWARFDebugLine::State::State(Prologue::shared_ptr& p, Log *l, DWARFDebugLine::State::Callback cb, void* userData) : - Row (p->default_is_stmt), - prologue (p), - log (l), - callback (cb), - callbackUserData (userData), - row (StartParsingLineTable) -{ - // Call the callback with the initial row state of zero for the prologue - if (callback) - callback(0, *this, callbackUserData); +DWARFDebugLine::State::State(Prologue::shared_ptr &p, Log *l, + DWARFDebugLine::State::Callback cb, void *userData) + : Row(p->default_is_stmt), prologue(p), log(l), callback(cb), + callbackUserData(userData), row(StartParsingLineTable) { + // Call the callback with the initial row state of zero for the prologue + if (callback) + callback(0, *this, callbackUserData); } //---------------------------------------------------------------------- // DWARFDebugLine::State::Reset //---------------------------------------------------------------------- -void -DWARFDebugLine::State::Reset() -{ - Row::Reset(prologue->default_is_stmt); -} +void DWARFDebugLine::State::Reset() { Row::Reset(prologue->default_is_stmt); } //---------------------------------------------------------------------- // DWARFDebugLine::State::AppendRowToMatrix //---------------------------------------------------------------------- -void -DWARFDebugLine::State::AppendRowToMatrix(dw_offset_t offset) -{ - // Each time we are to add an entry into the line table matrix - // call the callback function so that someone can do something with - // the current state of the state machine (like build a line table - // or dump the line table!) - if (log) - { - if (row == 0) - { - log->PutCString ("Address Line Column File ISA Flags"); - log->PutCString ("------------------ ------ ------ ------ --- -------------"); - } - Dump (log); +void DWARFDebugLine::State::AppendRowToMatrix(dw_offset_t offset) { + // Each time we are to add an entry into the line table matrix + // call the callback function so that someone can do something with + // the current state of the state machine (like build a line table + // or dump the line table!) + if (log) { + if (row == 0) { + log->PutCString("Address Line Column File ISA Flags"); + log->PutCString( + "------------------ ------ ------ ------ --- -------------"); } + Dump(log); + } - ++row; // Increase the row number before we call our callback for a real row - if (callback) - callback(offset, *this, callbackUserData); - PostAppend(); + ++row; // Increase the row number before we call our callback for a real row + if (callback) + callback(offset, *this, callbackUserData); + PostAppend(); } //---------------------------------------------------------------------- // DWARFDebugLine::State::Finalize //---------------------------------------------------------------------- -void -DWARFDebugLine::State::Finalize(dw_offset_t offset) -{ - // Call the callback with a special row state when we are done parsing a - // line table - row = DoneParsingLineTable; - if (callback) - callback(offset, *this, callbackUserData); +void DWARFDebugLine::State::Finalize(dw_offset_t offset) { + // Call the callback with a special row state when we are done parsing a + // line table + row = DoneParsingLineTable; + if (callback) + callback(offset, *this, callbackUserData); } -//void -//DWARFDebugLine::AppendLineTableData +// void +// DWARFDebugLine::AppendLineTableData //( // const DWARFDebugLine::Prologue* prologue, // const DWARFDebugLine::Row::collection& state_coll, @@ -1240,7 +1118,8 @@ DWARFDebugLine::State::Finalize(dw_offset_t offset) // bool default_is_stmt = prologue->default_is_stmt; // const DWARFDebugLine::Row reset_state(default_is_stmt); // const DWARFDebugLine::Row* prev_state = &reset_state; -// const int32_t max_line_increment_for_special_opcode = prologue->MaxLineIncrementForSpecialOpcode(); +// const int32_t max_line_increment_for_special_opcode = +// prologue->MaxLineIncrementForSpecialOpcode(); // for (pos = state_coll.begin(); pos != end; ++pos) // { // const DWARFDebugLine::Row& curr_state = *pos; @@ -1257,7 +1136,8 @@ DWARFDebugLine::State::Finalize(dw_offset_t offset) // if (prev_state == &reset_state) // { // debug_line_data.Append8(0); // Extended opcode -// debug_line_data.Append32_as_ULEB128(addr_size + 1); // Length of opcode bytes +// debug_line_data.Append32_as_ULEB128(addr_size + 1); // Length of +// opcode bytes // debug_line_data.Append8(DW_LNE_set_address); // debug_line_data.AppendMax64(curr_state.address, addr_size); // addr_advance = 0; @@ -1276,7 +1156,8 @@ DWARFDebugLine::State::Finalize(dw_offset_t offset) // } // // // Don't do anything fancy if we are at the end of a sequence -// // as we don't want to push any extra rows since the DW_LNE_end_sequence +// // as we don't want to push any extra rows since the +// DW_LNE_end_sequence // // will push a row itself! // if (curr_state.end_sequence) // { @@ -1310,26 +1191,38 @@ DWARFDebugLine::State::Finalize(dw_offset_t offset) // line_increment = 0; // } // -// uint32_t special_opcode = (line_increment >= prologue->line_base) ? ((line_increment - prologue->line_base) + (prologue->line_range * addr_advance) + prologue->opcode_base) : 256; +// uint32_t special_opcode = (line_increment >= +// prologue->line_base) ? ((line_increment - +// prologue->line_base) + (prologue->line_range * addr_advance) +// + prologue->opcode_base) : 256; // if (special_opcode > 255) // { -// // Both the address and line won't fit in one special opcode +// // Both the address and line won't fit in one special +// opcode // // check to see if just the line advance will? -// uint32_t special_opcode_line = ((line_increment >= prologue->line_base) && (line_increment != 0)) ? -// ((line_increment - prologue->line_base) + prologue->opcode_base) : 256; +// uint32_t special_opcode_line = ((line_increment >= +// prologue->line_base) && (line_increment != 0)) ? +// ((line_increment - prologue->line_base) + +// prologue->opcode_base) : 256; // // // if (special_opcode_line > 255) // { -// // Nope, the line advance won't fit by itself, check the address increment by itself +// // Nope, the line advance won't fit by itself, check +// the address increment by itself // uint32_t special_opcode_addr = addr_advance ? -// ((0 - prologue->line_base) + (prologue->line_range * addr_advance) + prologue->opcode_base) : 256; +// ((0 - prologue->line_base) + +// (prologue->line_range * addr_advance) + +// prologue->opcode_base) : 256; // // if (special_opcode_addr > 255) // { -// // Neither the address nor the line will fit in a -// // special opcode, we must manually enter both then -// // do a DW_LNS_copy to push a row (special opcode +// // Neither the address nor the line will fit in +// a +// // special opcode, we must manually enter both +// then +// // do a DW_LNS_copy to push a row (special +// opcode // // automatically imply a new row is pushed) // if (line_increment != 0) // { @@ -1349,9 +1242,12 @@ DWARFDebugLine::State::Finalize(dw_offset_t offset) // } // else // { -// // The address increment alone will fit into a special opcode -// // so modify our line change, then issue a special opcode -// // for the address increment and it will push a row into the +// // The address increment alone will fit into a +// special opcode +// // so modify our line change, then issue a +// special opcode +// // for the address increment and it will push a +// row into the // // line table // if (line_increment != 0) // { @@ -1359,16 +1255,21 @@ DWARFDebugLine::State::Finalize(dw_offset_t offset) // debug_line_data.Append32_as_SLEB128(line_increment); // } // -// // Advance of line and address will fit into a single byte special opcode -// // and this will also push a row onto the line table +// // Advance of line and address will fit into a +// single byte special opcode +// // and this will also push a row onto the line +// table // debug_line_data.Append8(special_opcode_addr); // } // } // else // { -// // The line change alone will fit into a special opcode -// // so modify our address increment first, then issue a -// // special opcode for the line change and it will push +// // The line change alone will fit into a special +// opcode +// // so modify our address increment first, then issue +// a +// // special opcode for the line change and it will +// push // // a row into the line table // if (addr_advance > 0) // { @@ -1376,14 +1277,16 @@ DWARFDebugLine::State::Finalize(dw_offset_t offset) // debug_line_data.Append32_as_ULEB128(addr_advance); // } // -// // Advance of line and address will fit into a single byte special opcode +// // Advance of line and address will fit into a +// single byte special opcode // // and this will also push a row onto the line table // debug_line_data.Append8(special_opcode_line); // } // } // else // { -// // Advance of line and address will fit into a single byte special opcode +// // Advance of line and address will fit into a single +// byte special opcode // // and this will also push a row onto the line table // debug_line_data.Append8(special_opcode); // } |
